Abu Darda' Radiyallahu 'anhu narrates that...
RasulAllah ﷺ said...
Shall I not inform you of something more excellent in degree than fasting, Sadaqah and Salah...
The Sahabah replied:
Certainly, do tell us...
He ﷺ answered...
It is putting things right between people...
For undoubtedly discord between people is destructive...
(Tirmidhi: 2509)