John 8:39

If ye were Abraham's children - Griesbach reads εϚε, ye are, instead of ητε, ye were, on the authority of BDL, Vulgate, four copies of the Itala; Origen and Augustin.

Ye would do the works of Abraham - As the son has the nature of his father in him, and naturally imitates him, so, if ye were the children of Abraham, ye would imitate him in his faith, obedience, and uprightness; but this ye do not, for ye seek to kill me - ye are watching for an opportunity to destroy me, merely because I tell you the truth: Abraham never did any thing like this; therefore, you have no spiritual relationship to him.

Abraham is our father - We are descended from Abraham. Of this the Jews boasted much, as being descended from such an illustrious man. See the notes at Matthew 3:9. As Jesus did not expressly say who he meant John 8:38 when he said they did the works of their father, they obstinately persisted in pretending not to understand him, as if they had said, "We acknowledge no other father but Abraham, and to charge us with being the offspring of another is slander and calumny."

If ye were Abraham's children - The words "sons" and "children" are often used to denote those who imitate another or who have his spirit. See the notes at Matthew 1:1. Here it means, "if you were worthy to be called the children of Abraham, or if you had his spirit."