Musannaf Ibn Abi Shayba 13:434

Humaid ibn Abd al-Rahman al-Ru'asi narrated to us, from al-Hasan, from al-Hakam, from Abd al-Rahman ibn Qays, who said: Qays said: "Ali burned for me threshing floors in al-Sawad that I had been hoarding. Had he left them for me, I would have profited from them like the stipend of Kufa."