John 8:58, and about eighteen lectures carry it. Neville never reads it as a claim to great age; he reads it as the collapse of the objection that produced it. The objection is always quoted with the saying - you are not yet fifty years old, and have you seen Abraham? - and the answer is that Abraham is a state and not a person, so nothing in the sentence is about years. But the argument he actually runs is his own and it comes from the other end: he has seen David, David called him Father, and a father precedes his son, so a man of fifty-eight precedes a man of three thousand years ago. That is why the question What think ye of the Christ, whose son is he? is always attached (M865's territory): the son of David who is also David's Lord is the same reversal. He reports the reaction as part of the motif - they took up stones to throw at him, and at 1315 he glosses the stones as the facts of life, you are only fifty years of age. 1385 takes it for a title. Beside it stands the same form without Abraham: before the world was, I am; and when the world shall cease to be, I am - so the speaker is not something that entered this time slot at a point in time.