Isa bin Yonus bin Abi Ishaq عيسى بن يونس بن أبي إسحاق · The Book of Agriculture

"The Messenger of Allah forbade Al-Muhaqalah and Al-Muzabanah, and said: 'Only three may cultivate: A man who has land which he cultivates; a man who was given some land and cultivates what he was given; and a man who takes land on lease for gold or silver.'"

"One of them may cover for the other if they were partners."