Musannaf Ibn Abi Shayba 13:1588

Abu Bakr narrated to us, he said: Abda bin Sulayman narrated to us, from Sa'id bin Abi Arubah, from Qatadah, from Sa'id bin al-Musayyib, that he said: There is no harm in a man treating palm trees and saying [to the owner] that he shall have a third or a quarter [of the yield] for it, as long as he does not spend anything of his own upon it.