Ubada bin As-Samit · The Book of Distribution of Al-Fay'

the Messenger of Allah went to a camel, and took a hair from its hump between his fingers and said: "I am not entitled to take anything from the Fay, not even this, except the Khumus, and the Khumus will come back to you."

"The wealth of Banu An-Nadir was among the Fay' that Allah bestowed upon His Messenger, in cases where the Muslims did not go out on and expedition with horses and camels. From it he kept for himself food for one year, and what was left he spent on cavalry and weapons equipment for the cause of Allah."

" Iasked Al-Hasan bin Muhammad about the saying of Allah, the Might and Sublime: 'and know that whatever of spoils of war that you may gain, verily, one-fifth of it is assigned to Allah. He said: 'This is the key to the Speech of Allah. This world and the Hereafter belling to Allah. He said: 'They differed concerning these two shares after the death of the Messenger of Allah, the share of the Messenger and the share of the near…