Acts 13:26

Brethren, children of the stock of Abraham, and those among you that fear God, to us is the word of this salvation sent forth. For they that dwell in Jerusalem, and their rulers, because they knew him not, nor the voices of the prophets which are read every sabbath, fulfilled them by condemning him. And though they found no cause of death in him, yet asked they of Pilate that he should be slain. And when they had fulfilled all things that were written of him, they took him down from the tree, and laid him in a tomb.

Of the stock of Abraham ... Paul here qualified this with the adjacent clause, "those among you that fear God," indicating that not all of the stock of Abraham feared God. This distinction between the secular and the spiritual Israel would receive extensive treatment by Paul in Romans 9-11.

Rulers, because they knew him not ... The ignorance of Israel was a factor leading to their rejection of Christ. Despite the fact that they were not ignorant of his Messiahship, of his being the rightful heir of the temple and the extinct throne of Solomon, nor of his being a holy, just and righteous person, they WERE ignorant of the all-important fact that Jesus was God come in the flesh.

Fulfilled them by condemning him ... The prophets had clearly foretold the rejection of the Christ; therefore, their very action of crucifying the Lord proved that he was the promised Deliverer.

Down from the tree ... "The Greek term here is [@xulou] and means not only tree, but wood."[26] The apostolic preachers stressed the offense of the cross, "Cursed is every one that is hanged on a tree" (Deuteronomy 21:23; Galatians 3:13).

They ... laid him in a tomb ... The antecedent of "they" in this passage would appear to be "dwellers in Jerusalem," including both disciples of Jesus and the class who were his enemies, since it was the latter who condemned him, his friends who took him down from the tree and laid him in a tomb, and both classes who "fulfilled all things" that were written of him.