Albert Barnes Commentary Psalms 30:10

"Hear, O Jehovah, and have mercy upon me: Jehovah, be thou my helper." — Psalms 30:10 (ASV)

Hear, O Lord, and have mercy upon me, - etc. This, too, is the prayer which he uttered in the calamities adverted to in (Psalms 30:7). It is a cry for mercy founded on the idea referred to in (Psalms 30:9).