Albert Barnes Commentary Psalms 35:12

"They reward me evil for good, [To] the bereaving of my soul." — Psalms 35:12 (ASV)

They rewarded me evil for good - They recompensed, or returned evil instead of good. The manner in which they did it he states in the following verses.

To the spoiling of my soul - Margin, "depriving." The Hebrew word means "the being forsaken," or "abandoned." The idea is, that owing to this conduct he was forsaken or abandoned by all in whom he might have put confidence.