You use the term "always", but the parable mentions the prodigal son having returned home once and being received by The Father only one time. Had the prodigal son decided to leave home again after having earned some money by working at his father's house for a few years, and then returned again, would the father receive him with open arms once more? And if the situation had repeated itself oncce every few years, would the father keep receiving him back?
Hmm, well I guess that is a point worth looking in to...
Well Im sure one can find any verse to fit their doctrine through viewing it in a certian manner, but there a few come to mind to give what I beleive:
He will not leave of forsake us:
Deuteronomy 31:5-6,5 “And יהוה shall give them over to you, and you shall do to them according to all the command which I have commanded you."6 “Be strong and courageous, do not fear nor be afraid of them. For it is יהוה your Elohim who is going with you. He does not fail you nor forsake you.”"
However we can leave and forsake Him by disobedience or dibelief and thus cause seperation:
Isaiah 59:1-2,1 Look, the hand of יהוה has not become too short to save, nor His ear too heavy to hear."2 But your crookednesses have separated you from your Elohim. And your sins have hidden His face from you, from hearing."
However as the prodigal son those seperated can return to Him:
Zechariah 1:3-4,3 “And you shall say to them, ‘Thus said יהוה of hosts, “Turn back to Me,” declares יהוה of hosts, “and I shall turn back to you,” declares יהוה of hosts."4 “Do not be like your fathers, to whom the former prophets proclaimed, saying, ‘Thus said יהוה of hosts, “Turn back now from your evil ways and your evil deeds.” ’ But they did not obey or give heed to Me,” declares יהוה."
and Israyl is a good example as they were very disobedient and were brought into captivity a number of times, many were killed, enslaved, died in foregin lands, etc. some held fast to or turned back to Yah...
Yet this is a nation not an indivigual, but I think to some degree this lesson stiull applies..
This comes to mind as a teaching concernning this:
Hebrews 3:16-19, “For some, when they had heard, rebelled. But not all rebelled who came out of Egypt through Mosheh. But with whom was He angry forty years? Was it not with those who sinned, whose corpses fell in the wilderness? And to whom did He vow that they would not enter into His rest, but to those who did not obey? So we see that they could not enter in because of unbelief.”
Hebrews 4:2, “For this message was preached to us, as well as to them; but the word which they heard did not benefit them, because they did not share in the faith of those who obeyed.”
There is a point of no return:
Hebrews 6:4-6,4 For it is impossible for those who were once enlightened, and have tasted the heavenly gift, and have become partakers of the Set-apart Spirit,"5 and have tasted the good Word of Elohim and the powers of the age to come,"6 and fall away, to renew them again to repentance – having impaled for themselves the Son of Elohim again, and put Him to open shame."
WIith all this considered I think we dont really know when too far is too far, as people can claim whatever they want it;s the judges decision...
Luke 13:28, "In that place there will be weeping and gnashing of teeth when you see Abraham and Isaac and Jacob and all the prophets in the kingdom of Yah, but yourselves being thrown out.”
I say we should seek Him while we are able as to not push it...
Psalms 95:1-11,1 Come, let us sing to יהוה! Let us raise a shout to the Rock of our deliverance."2 Let us come before His face with thanksgiving; Let us raise a shout to Him in song."3 For יהוה is a great Ěl, And a great Sovereign above all mighty ones."4 In whose hand are the depths of the earth; The mountain peaks are His also."5 His is the sea, for He made it; And His hands formed the dry land."6
Come, let us bow down and bend low, Let us kneel before יהוה our Maker."7 For He is our Elohim, And we are the people of His pasture, And the sheep of His hand.
Today, if you would hear His voice:"8 “Do not harden your hearts as in Meriḇah, And as in the day of Massah in the wilderness,"9 “When your fathers tried Me, Have proved Me, though they saw My work."10 “For forty years I was grieved with that generation, And said, ‘They are a people who go astray in their hearts, And they do not know My ways.’"11 “As I swore in My wrath, ‘If they enter into My rest...’ ”"