Musannaf Ibn Abi Shayba 28:449

Ibn Idris narrated to us, from Malik ibn Anas, from Zayd ibn Aslam, from Aslam, who said: I heard Umar saying: "By the One in whose hand is the soul of Umar, were it not that the last of the people would be left with nothing, I would not have conquered a village of the villages of the disbelievers except that I would have divided it into shares, just as the Messenger of Allah (may Allah bless him and grant him peace) divided Khaybar into shares. But I wanted it to be a source of income that flows for them, and I disliked that the last of the people should be left with nothing."