if you read the whole chapter there and then look to the contemporary verses you’ll find that it works together describing the tribulation that would occur after Jesus ascended to Jerusalem and then to all the world after
“Then said
he unto them, Nation shall rise against nation, and kingdom against kingdom: and great earthquakes shall be in divers places, and famines, and pestilences; and fearful sights and great signs shall there be from heaven.
But before all these, they shall lay their hands on you, and persecute you, delivering you up to the synagogues, and into prisons, being brought before kings and rulers for my name's sake. And it shall turn to you for a testimony. And ye shall be betrayed both by parents, and brethren, and kinsfolks, and friends; and some of you shall they cause to be put to death. And ye shall be hated of all men for my name's sake. In your patience possess ye your souls. ( the tribulation )
And
when ye shall see Jerusalem compassed with armies, then know that the desolation thereof is nigh. ( 70 ad) And
they shall fall by the edge of the sword, and shall be led away captive into all nations: and Jerusalem shall be trodden down of the Gentiles, until the times of the Gentiles be fulfilled. ( 70 ad- the end of the world )
And
there shall be signs in the sun, and in the moon, and in the stars; and upon the earth
distress of nations, with perplexity; the sea and the waves roaring;
men's hearts failing them for fear, and for looking after those things which are coming on the earth: for the powers of heaven shall be shaken.
And
then shall they see the Son of man coming in a cloud with power and great glory.”
Luke 21:10-13, 16-17, 19-20, 24-27 KJV
this is only one section regarding this there are contemporary verses like for instance mark 13
“And Jesus answering them began to say, Take heed lest any man deceive you: And when ye shall hear of wars and rumours of wars, be ye not troubled: for such things must needs be; but the end shall not be yet. For nation shall rise against nation, and kingdom against kingdom: and there shall be earthquakes in divers places, and there shall be famines and troubles: these are the beginnings of sorrows. But take heed to yourselves: for they shall deliver you up to councils; and in the synagogues ye shall be beaten: and ye shall be brought before rulers and kings for my sake, for a testimony against them. And the gospel must first be published among all nations. Now the brother shall betray the brother to death, and the father the son; and children shall rise up against their parents, and shall cause them to be put to death. And ye shall be hated of all men for my name's sake: but he that shall endure unto the end, the same shall be saved.”
Mark 13:5, 7-10, 12-13 KJV
Or Matthew 24
“For nation shall rise against nation, and kingdom against kingdom: and there shall be famines, and pestilences, and earthquakes, in divers places. All these are the beginning of sorrows. Then shall they deliver you up to be afflicted, and shall kill you: and ye shall be hated of all nations for my name's sake. And then shall many be offended, and shall betray one another, and shall hate one another. And many false prophets shall rise, and shall deceive many. And because iniquity shall abound, the love of many shall wax cold. But he that shall endure unto the end, the same shall be saved. And this gospel of the kingdom shall be preached in all the world for a witness unto all nations; and then shall the end come.”
Matthew 24:7-14
Just three examples but not nice we hear the foundational things Jesus said then you begin to jeer the epistles which add to and refine the understanding like
“For this we say unto you by the word of the Lord, that
we which are alive and remain unto the coming of the Lord shall not prevent them which are asleep. For
the Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: and the dead in Christ shall rise first:
then we which are alive and remain shall be caught up together with them in the clouds, to meet the Lord in the air: and so shall we ever be with the Lord.”
1 Thessalonians 4:15-17 KJV
what I’m saying is there are pieces of information about Jesus return from heaven at the end of the world throughout the New Testament and even in parts of the ot
The key is that
they are all witnessing the same things each wotness adds some details and discernment we can actually understand better