(191) بَابُ الْمُهْتَجِرَيْنِ
Abu Ayyub al-Ansari reported that the Messenger of Allah, may Allahbless him and grant him peace, said, "It is not lawful for a Muslim torefuse to speak to his (Muslim) brother for more than three days so thatwhen they meet, one goes this way and the goes that way. The better ofthe two is the one who initiates the greeting."
Reference: Al-Adab Al-Mufrad 406
In-book reference: Book 22, Hadith 10
English translation: Book 22, Hadith 406