Albert Barnes Commentary Psalms 106:9

"He rebuked the Red Sea also, and it was dried up: So he led them through the depths, as through a wilderness." — Psalms 106:9 (ASV)

He rebuked the Red Sea also - The word rendered “rebuke” commonly means to chide—as when one is angry with another for having done wrong. Here it is evidently a poetic term, meaning that he spoke “as if” he were angry, or “as if” the Red Sea did wrong in presenting an obstacle or obstruction to the passage of his people. .

So he led them through the depths - Through what had been the abyss; what had seemed to be depths, being covered with water.

As through the wilderness - As through a desert or dry place; as he afterward led them through the wilderness. The waters split apart and made a way for them.