Oecumenius : "saying nothing except what the prophets said." For fear that he himself be thought the teacher of this, he cites the prophets and Moses, saying, "that Christ, if he was to suffer, and if he was to be first from the resurrection of the dead," and what follows. But the phrase "if" (εἰ), instead of "that" (ὅτι), means "is." Moses, he said, declared that Christ would be the first to undergo resurrection. For he first rose here and no longer dies: for although some others had been raised either by him or by the disciples, and likewise by the prophets, they died again, awaiting the universal resurrection. [CHRYSOSTOM] — Commentary on Acts Tertullian : In like manner, before Agrippa also, he says that he was advancing "none other things than those which the prophets had announced." He was therefore maintaining just such a resurrection as the prophets had foretold. — On the Resurrection of the Flesh