John Gill Bible Commentary

Let not the water flood overflow me,.... The enemy, Satan, that came in like a flood upon him, with his whole posse of devils; or the wrath of God, which came upon him like a flood overwhelming him: neither let the deep swallow me up: as Jonah by the whale, and Dathan and Abiram in the earth: and let not the pit shut her mouth upon me; either the pit of hell; so the Targum interprets it: for Christ, when he endured the curses of the law, and the wrath of God, suffered the same for kind as the damned in hell; only the mouth of this pit could not be shut upon him, or he be continued under such wrath and curse: or else the pit of the grave, where his divine Father left him not, or suffered him to be so long in it as to see corruption; this pit was not shut upon him, but he was delivered out of it, and will die no more.