Abu Ad-Darda' narrated that the Messenger of Allah (s.a.w) said:
"Shall I not inform you of what is more virtuous than the rank of fasting, Salat, and charity?" They said: "But of course!" He said: "Making peace between each other. For indeed spoiling relations with each other is the Haliqah." (ID)
English reference (ID): Vol. 4, Book 11, Hadith 2509 (ID)
Arabic reference (ID): Book 37, Hadith 2698 (ID)