Psalms 143:3

3.For the enemy hath persecuted my soul. Having acknowledged that he only suffered the just punishment of his sins, David comes now to speak of his enemies; for to have begun by speaking of them would have been a preposterous order. Their cruelty was shown in their not resting satisfied but with the destruction of one who was a saint of God; he declares that he must even now perish unless God should help him speedily. The comparison is not merely to a dead man, but a putrid corpse; for by the dead of an age (250) are meant those who have been long removed from the world. Such language intimates that he not only trusted in God as he who could heal him of a deadly disease, but considered that though his life should be buried, as it were, and long out of mind, God could raise it again, and restore his very ashes.