Ps 18:15

18:15 were seen . . . laid bare. When God appears as a defender of His people, the waters representing chaos and evil shrink back. Compare 77:16–19 (reflecting on the Exodus from Egypt); Nah. 1:4; Rev. 21:1.

rebuke. God controls the chaotic waters of the sea (Ps. 106:9). Jesus shows Himself to be the Second Person of the Trinity by silencing the chaotic waters with His rebuke (Luke 8:22–25).