Abu Dawud
General Behavior
Book Number: 036 / Hadith Number: 4901
Narated By AbudDarda' : The Prophet (pbuh) said: Shall I not inform you of something more excellent in degree than fasting, prayer and almsgiving (sadaqah)? The people replied: Yes, Prophet of Allah! He said: It is putting things right between people, spoiling them is the shaver (destructive).