Aḥmad ibn Yaḥyá al-Balādhurī, The Origins of the Islamic State (1916)
“ The Prophet's special share. ʿAmr ibn-Muḥammad an-Nâḳid from Mâlik ibn-Aus ibn-al-Ḥadathân:—It was stated by 'Umar ibn-al-Khaṭṭâb that the possessions of the banu-an-Naḍîr were assigned by Allah to the Prophet, the Moslems having not "pressed toward them with horse or camel." Thus they were wholly his property. The Prophet used to spend their annual income on his family and invest what was left in horses and arms to be used in the cause of Allah. ”
