Charles H. Spurgeon on Psalms 124:3

Then they had swallowed us up. The word implies eating with insatiable appetite; every man that eateth must also swallow; but a glutton is rather a swallower than an eater. He throws his meat whole down his throat, and eats (as we may say) without chewing. The rod of Moses, turned into a serpent, "swallowed up" the rods of the Egyptian sorcerers. The word is often applied to express oppression (Ps 35:25): "Let them not say in their hearts, Ah, so would we have it: let them not say, We have swallowed him up": that is, we have made clear riddance of him; he is now a gone man for ever. The ravenous rage of the adversary is described in this language. —Joseph Caryl.