Hadith #4911General Behavior (Kitab Al-Adab) · Narrated by Aisha bint Abi Bakr, Hisham bin 'Urwa هشام بن عروة, Muhammad bin al-Muthna - al-Zaman محمد بن المثنى أبو موسى - الزمن, Muhammad bin Khalid bin Athmh محمد بن خالد بن عثمة, Urwa ibn al-Zubayr عروة بن الزبير · Sahih
it is not allowable for a Muslim to keep apart from his brother for more than three days. When they meet, this turns away from him, and that turns away from him. The better of the two is the one who initiates in salutation.