Musannaf Ibn Abi Shayba 13:1275

Abu Bakr narrated to us, he said: Waki’ narrated to us, from Sufyan, from al-Harith ibn Hasirah, from Sakhr ibn al-Walid, from ‘Amr ibn Sulay’, from ‘Ali, that he saw no harm in sharecropping for half [of the produce].