Matthew 22:32

I am the God of Abraham] Exodus 3:6. The proof of the resurrection is taken from the Law, not because the Sadducees rejected the Prophets and Hagiographa, of which there is no certain proof, but because to every Jew the Law was of higher authority than any other part of the canon. Theophylact says, 'He said not “I was,” but “I am the God of Abraham, Isaac, and Jacob.” For though they are dead, yet they live through the hope of the resurrection. Here the Lord opposes the heresy of the Sadducees, saying, “God is not the God of the dead, i.e. of men who have altogether perished, but of the living, i.e. of those who have immortal souls, and though they are now dead will rise again.”' Strictly speaking, the argument of Jesus is an argument for human immortality, but to Jewish minds the idea of immortality necessarily carried with it the idea of a resurrection.