(62) باب الْهِجْرَةِ
Narrated Anas bin Malik:
Allah's Messenger (ﷺ) said, "Do not hate one another, nor be jealous of one another; and do not desert one another, but O Allah's worshipers! Be Brothers! And it is unlawful for a Muslim to desert his brother Muslim (and not to talk to him) for more than three nights."
Reference: Sahih al-Bukhari 6076
In-book reference: Book 78, Hadith 104
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 8, Book 73, Hadith 99