In his will, Imam Ali (AS) said: I recommend to you and all my children and family, and all those who read this will; to fear God, and have discipline in living affairs (daily life), and establish peace and reconciliation between yourselves, because I heard from your grandfather, the Prophet of Islam (PBUH) who said: Restoring relation between people is better than one year of Salaat and fasting [1].
[1] Nahjul Balaghah, Letter 47.
source : shafaqna