Albert Barnes Commentary Psalms 109:31

"For he will stand at the right hand of the needy, To save him from them that judge his soul." — Psalms 109:31 (ASV)

For he shall stand at the right hand of the poor—He will thus show that he befriends the poor and the helpless.

To save him from those that condemn his soul—Margin, "from the judges of his soul." The Hebrew is, "from those that judge his soul." The meaning is, from those that pronounce a harsh or unjust judgment; from those that condemn the innocent.