Albert Barnes Commentary Psalms 76:9

"When God arose to judgment, To save all the meek of the earth. Selah" — Psalms 76:9 (ASV)

When God arose to judgment - That is, when he came to overthrow and destroy the enemies of his people, as referred to in the former part of the psalm.

To save all the meek of the earth - Of the land - that is, the land of Judea; or, to save his people when in affliction. The word “meek,” which with us usually means those who are forbearing under injuries, means here the humble, the afflicted, the crushed, the oppressed.