Matthew 5:18
“For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled.”
Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven.
Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfil.
For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled.
Whosoever therefore shall break one of these least commandments, and shall teach men so, he shall be called the least in the kingdom of heaven: but whosoever shall do and teach them, the same shall be called great in the kingdom of heaven.
For I say unto you, That except your righteousness shall exceed the righteousness of the scribes and Pharisees, ye shall in no case enter into the kingdom of heaven.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“Heaven and earth shall pass away, but my words shall not pass away.”
“And it is easier for heaven and earth to pass, than one tittle of the law to fail.”
“The grass withereth, the flower fadeth: but the word of our God shall stand for ever.”
“The grass withereth, the flower fadeth: but the word of our God shall stand for ever.”
“Seek ye out of the book of the Lord, and read: no one of these shall fail, none shall want her mate: for my mouth it hath commanded, and his spirit it hath gathered them.”