Albert Barnes Commentary Matthew 22:29

"But Jesus answered and said unto them, Ye do err, not knowing the scriptures, nor the power of God." — Matthew 22:29 (ASV)

You do err, not knowing, etc. They had taken a wrong view of the doctrine of the resurrection. It was not taught that men would marry there. The Scriptures, here, mean the books of the Old Testament. By appealing to them, he showed that the doctrine of the future state was there, and that the Sadducees should have believed it as it was, and not have added the absurd doctrine to it that men must live there as they do here.

The way in which the enemies of the truth attempt to make a doctrine of the Bible ridiculous is by adding to it, and then calling it absurd. He produced a passage from the books of Moses, Matthew 22:32, because they had also appealed to his writings, Matthew 22:24. Other places of the Old Testament asserted it more clearly, Daniel 12:2; Isaiah 26:19; but he wished to meet them on their own ground. None of those Scriptures asserted that men would live there as they do here, and therefore their reasoning was false.

Nor the power of God. They probably denied, as many have done since, that God could gather the scattered dust of the dead and remold it into a body. On this ground they affirmed that the doctrine could not be true—opposing reason to revelation, and maintaining that Infinite Power could not reorganize a body that it had at first organized, nor raise a body from its own dust, which God had at first raised from nothing.