Psalm 9
Praise for God as a just judge and "a refuge for the oppressed." This psalm is clear about justice. It's a comfort to the needy and a warning to the nations who forget God. God remembers the cry of the afflicted. (Psalms 9 and 10 form a single broken acrostic in Hebrew.)
"Those who know Your name trust in You, for You, O LORD, have not forsaken those who seek You." (Psalm 9:10)