Affan bin Muslim عفان بن مسلم بن عبد الله الصفار · The Book of Agriculture

"When you hire a worker, tell him what his wages will be."

It was narrated from Ibn 'Umar that the Prophet gave the datepalms of Khaibar and their land to the Jews of Khaibar, on condition that they would take care of them at their expense, and the Messenger of Allah would have half of whatever they produced.