مسند أحمد

Sufyan bin Wahb al Khawlani said: When we conquered Egypt without a peace deal (i.e., by force), az-Zubair bin al-`Awwam (رضي الله عنه) stood up and said: “O `Amr bin al `As, divide the land.” `Amr said: “I shall not divide it.” az-Zubair (رضي الله عنه) said: “By Allah, you will divide it as the Messenger of Allah (ﷺ) divided Khaibar!” ‘Amr said: “By Allah, I shall not divide it until I write to Ameer al-Mu`mineen.” So he wrote to `Umar (رضي الله عنه) and `Umar wrote back to him (saying}, Leave it so that the third generation (i.e., the offspring of the foetuses currently in their mother`s wombs) may use the income from it to go out on campaign for the sake of Allah.