Or who shut up the sea with doors, when it brake forth, as if it had issued out of the womb?
Doors - flood-gates; these when opened caused the flood (Genesis 7:11); or else the shores.
Womb - of chaos. The bowels of the earth. Image from child-birth (Job 38:8-9). Ocean at its birth was wrapped in clouds as its swaddling bands (Ezekiel 32:2; Micah 4:10).