Need help finding a bible passage

Hola... I just joined the site and this is my first post on the forums.

There is this bible passage I read awhile ago that I cannot find again after a ton of searching. I checked my saved verses on my phone's bible app (hundreds of them) and did a bunch of internet searches, but nothing clicks. I don't know if it is a single verse or several of them, and if it is a general statement or about specific people... I don't even remember if it is in the OT or NT. I'll describe the vague recollection I have in hopes someone here can help:

The idea is that a mature person should no longer be expected to take on / solve major issues or important challenges that someone younger can handle. I took it to mean, as an example, that they did all of that when they were younger and should now relax in their advance years while the next generation steps up to resolve various problems.

Does any of that make sense to someone? Again, I did a ton of web searches on keywords like elderly, seniors, and even the youth, but nothing comes close. Thanks in advance for suggestions.

Here's one
1Timothy 5:4 But if any widow have children or nephews, let them learn first to shew piety at home, and to requite their parents: for that is good and acceptable before God.
5 Now she that is a widow indeed, and desolate, trusteth in God, and continueth in supplications and prayers night and day.
6 But she that liveth in pleasure is dead while she liveth.
7 And these things give in charge, that they may be blameless.
8 But if any provide not for his own, and specially for those of his own house, he hath denied the faith, and is worse than an infidel.
9 Let not a widow be taken into the number under threescore years old, having been the wife of one man.
10 Well reported of for good works; if she have brought up children, if she have lodged strangers, if she have washed the saints' feet, if she have relieved the afflicted, if she have diligently followed every good work.
11 But the younger widows refuse: for when they have begun to wax wanton against Christ, they will marry;
12 Having damnation, because they have cast off their first faith.
13 And withal they learn to be idle, wandering about from house to house; and not only idle, but tattlers also and busybodies, speaking things which they ought not.
14 I will therefore that the younger women marry, bear children, guide the house, give none occasion to the adversary to speak reproachfully.
15 For some are already turned aside after Satan.
16 If any man or woman that believeth have widows, let them relieve them, and let not the church be charged; that it may relieve them that are widows indeed.
17 Let the elders that rule well be counted worthy of double honour, especially they who labour in the word and doctrine.
18 For the scripture saith, Thou shalt not muzzle the ox that treadeth out the corn. And, The labourer is worthy of his reward.
19 Against an elder receive not an accusation, but before two or three witnesses.
20 Them that sin rebuke before all, that others also may fear.

Welcome!

Greetings.... your memory doesn't sound like anything I've read... perhaps some scriptures talk about age versus youth, but usually it is making the point that the older, more mature believers are to be spiritual leaders. I don't remember anything indicating they should just sit back and take it easy, letting the younger folks do all the heavy lifting...
I don't know if the verses from Timothy posted above will help, but here they are in today's English, in case you don't understand some of the quirky expressions used in ancient English...

4 But if she has children or grandchildren, their first responsibility is to show godliness at home and repay their parents by taking care of them. This is something that pleases God.
5 Now a true widow, a woman who is truly alone in this world, has placed her hope in God. She prays night and day, asking God for his help. 6 But the widow who lives only for pleasure is spiritually dead even while she lives. 7 Give these instructions to the church so that no one will be open to criticism.
8 But those who won’t care for their relatives, especially those in their own household, have denied the true faith. Such people are worse than unbelievers.
9 A widow who is put on the list for support must be a woman who is at least sixty years old and was faithful to her husband.[c] 10 She must be well respected by everyone because of the good she has done. Has she brought up her children well? Has she been kind to strangers and served other believers humbly?[d] Has she helped those who are in trouble? Has she always been ready to do good?
11 The younger widows should not be on the list, because their physical desires will overpower their devotion to Christ and they will want to remarry. 12 Then they would be guilty of breaking their previous pledge. 13 And if they are on the list, they will learn to be lazy and will spend their time gossiping from house to house, meddling in other people’s business and talking about things they shouldn’t. 14 So I advise these younger widows to marry again, have children, and take care of their own homes. Then the enemy will not be able to say anything against them. 15 For I am afraid that some of them have already gone astray and now follow Satan.
16 If a woman who is a believer has relatives who are widows, she must take care of them and not put the responsibility on the church. Then the church can care for the widows who are truly alone.
17 Elders who do their work well should be respected and paid well,[e] especially those who work hard at both preaching and teaching. 18 For the Scripture says, “You must not muzzle an ox to keep it from eating as it treads out the grain.” And in another place, “Those who work deserve their pay!”[f]
19 Do not listen to an accusation against an elder unless it is confirmed by two or three witnesses. 20 Those who sin should be reprimanded in front of the whole church; this will serve as a strong warning to others.

I can't think of any scripture that exactly matches your memory. As others have pointed out, there are some scriptures that can give you an insight into God's expectations of us in how we need to care and share, and our responsibilities towards our family members. Every case will have its own complexities, so it's not always possible to have a specific rule that covers all. When all is said and done, families pray and discuss and make decisions based on what is fair and reasonable for all affected.

There is a saying by Jesus that should underwrite our decision making re familial responsibilities, and that is that all those that do the will of our Father in Heaven are our sisters and brother and mother, they are our principal family.

Ecclesiates 12:1-7?

No. There is nothing of this nature in the Bible. Indeed if anything it is the opposite, hence the term "elder" (mature Christian) for those who are meant to take oversight of a church.

any of these?

Exodus 20:12
12Honour thy father and thy mother: that thy days may be long upon the land which the LORD thy God giveth thee.

Proverbs 22:22-26
22Hearken unto thy father that begat thee, and despise not thy mother when she is old.
23Buy the truth, and sell it not; also wisdom, and instruction, and understanding.
24The father of the righteous shall greatly rejoice: and he that begetteth a wise childshall have joy of him.
25Thy father and thy mother shall be glad, and she that bare thee shall rejoice.
26My son, give me thine heart, and let thine eyes observe my ways.

Ephesians 6:1-4
1Children, obey your parents in the Lord: for this is right. 2Honour thy father and mother; (which is the first commandment with promise 3That it may be well with thee, and thou mayest live long on the earth.

4And, ye fathers, provoke not your children to wrath: but bring them up in the nurture and admonition of the Lord.

Are you talking about where Moses father in-law Jethro advised Moses to delegate. Exodus 18: 21-22 ( though not exactly as you remembered)

Are you talking about where Moses father in-law Jethro advised Moses to delegate. Exodus 18: 21-22 ( though not exactly as you remembered)

Another example of delegation...

Luke 7
Jesus Heals a Centurion’s Servant
1After he had finished all his sayings in the hearing of the people, he entered Capernaum. 2Now a centurion had a servanta who was sick and at the point of death, who was highly valued by him. 3When the centurionb heard about Jesus, he sent to him elders of the Jews, asking him to come and heal his servant. 4And when they came to Jesus, they pleaded with him earnestly, saying, “He is worthy to have you do this for him, 5for he loves our nation, and he is the one who built us our synagogue.” 6And Jesus went with them. When he was not far from the house, the centurion sent friends, saying to him, “Lord, do not trouble yourself, for I am not worthy to have you come under my roof. 7Therefore I did not presume to come to you. But say the word, and let my servant be healed. 8For I too am a man set under authority, with soldiers under me: and I say to one, ‘Go,’ and he goes; and to another, ‘Come,’ and he comes; and to my servant, ‘Do this,’ and he does it.” 9When Jesus heard these things, he marveled at him, and turning to the crowd that followed him, said, “I tell you, not even in Israel have I found such faith.” 10And when those who had been sent returned to the house, they found the servant well.

no idea

I have the same problem as you, I can't find a bible passage,
"I think everything done in this world is vain""

Suggest you pick the 1611 edition of the King James Version Bible for study.

Be reminded there are several versions of the Bible and many have been re-written with a new age religion slant. .....It has been changed. Avoid them like the ...plague.

go through proverbs, that's where you might have read something that you have interpreted. It is not scriptural.

Actually, I was thinking Proverbs, Might be were you find what you are thinking about also.