Numbers 25:9

9.And those that died in the plague. Paul, when he says that only twenty-three thousand died, appears to differ from Moses; but we know that the exact account of numbers is not always observed, and it is probable that about twenty-four thousand were slain. Paul, therefore, subtracted one thousand, and was content with the lesser number; (185) from which, however, we may perceive how severe and terrible was the punishment, teaching us to beware of provoking God by fornication. For, as it is a monstrous thing that so great a multitude should have been infected by this foul and shameful sin, so God’s fearful judgment against adulterers and fornicators is set before us. We have already seen that, although they were guilty of a wicked rebellion, still the punishment is justly ascribed to their lust, which impelled them to idolatry.