I will not violate my covenant or alter what my lips have uttered. Psalm 89:34
God fulfilling the law through the Messiah is neither a violation nor an alteration of His covenant.
For truly I tell you, until heaven and earth disappear, not the smallest letter, not the least stroke of a pen, will by any means disappear from the Law until everything is accomplished. Matthew 5:18
When he had received the drink, Jesus said, “It is finished.” With that, he bowed his head and gave up his spirit. John 19:30
It is finished, accomplished, fulfilled.
Lets look a little closer at the context....
Mat 5:17 “
Do not think that I came to destroy the Law or the Prophets. I did not come to destroy but to fulfill. 18 For assuredly, I say to you, till heaven and earth pass away, one [
b]jot or one [
c]tittle will by no means pass from the law till
all is fulfilled. 19
Whoever therefore breaks one of the least of these commandments, and teaches men so, shall be called least in the kingdom of heaven; but whoever does and teaches
them, he shall be called great in the kingdom of heaven. 20 For I say to you,
that unless your righteousness exceeds the righteousness of the scribes and Pharisees, you will by no means enter the kingdom of heaven.
None of these verses say not to break the least of these commandments until the cross. We weren't even born then. Jesus said not a jot or tittle of the law will pass until ALL is fulfilled. He went on to say whoever breaks and teaches others to break the least of these commandments affects us being in heaven Mat 5:19-20
There are many prophecies in the law and prophets that have yet to be fulfilled like this one that the Prophet Isaiah foretold of the Second Coming of Jesus Christ that has yet to be fulfilled
Isa 25:8
he will swallow up death forever.
The Sovereign Lord will wipe away the tears
from all faces;
he will remove his people’s disgrace
from all the earth.
The Lord has spoken.
Rev 21:4 And God shall wipe away all tears from their eyes; and there shall be no more death, neither sorrow, nor crying, neither shall there be any more pain: for the former things are passed away.
Jesus was very clear, not a jot or tittle can pass before ALL is fulfilled, He did not come to destroy the law or prophets like the prophet Isaiah future prophecies yet to have happened and why heaven and earth are still here, therefore, so is God's law exactly the way He said, no editing Psa 89:34 Mat 5:18
At the Cross, It is Finished is referring to His covenant being ratified by His blood and Jesus took back dominion of this earth that Satan previously had. The plan of redemption was complete but the work of Jesus is not complete until Judgement, the wheat and tares separated and those in Him are reconciled and will be with Him forevermore.
Rev 22:14 14
Blessed are those who do His commandments,
that they may have the right to the tree of life, and may enter through the gates into the city.