Waki' bin al-Jarrah وكيع بن الجراح · The Chapters on Pawning

“If one of us did not need his land, he would give it (to someone else to cultivate) in return for one third, or one half of the yield , and he would stipulate (that the should receive) the produce grows on the banks of three streams, and the grains that remain in the ear after threshing, and the produce irrigated by a stream. Life at that time was hard, and he would work (the land) with iron and whatever…

“When the Messenger of Allah (ﷺ) conquered Khaibar, he gave it (to its people) in return for half (of its yield).”

“O Messenger of Allah (ﷺ), what are the things which are not permissible to withhold?” He said: “Water, salt and fire.” She said: “I said: 'O Messenger of Allah (ﷺ), we know what water is, but what about salt and fire?” He said: “O Humaira', whoever gives fire (to another), it is as if he has given in charity all the food that is cooked on that fire. And whoever gives salt, it is as if he has given in…