Those who believe and do good deeds are few!

Verse 24 of Chapter 38:

(David) said: He hath wronged thee in demanding thine ewe in addition to his ewes, and lo! many partners oppress one another, save such as believe and do good works, and they are few. And David guessed that We had tried him, and he sought forgiveness of his Lord, and he bowed himself and fell down prostrate and repented.