Sahih Muslim | Book 10 | Hadith Number 3762

Narrated by Abdullah b. Umar (Allah be pleased with them)
Abdullah b. Umar (Allah be pleased with them) reported that Allah's Messenger (may peace be upon him) returned to the Jews of Khaibar the date-palms of Khaibar and its

land on the condition that they should work upon them with their own wealth (seeds, implements), and give half of the yield to Allah's Messenger (may peace be upon him).