Musnad Abu Ya'la al-Mawsili 109:36

Zakariya ibn Yahya narrated to us, Hushaym narrated to us, from Hajjaj, from Ata, from Jabir, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "Whoever possesses land, let him cultivate it. If he is unable to do so, then let him grant it to his Muslim brother, and let him not lease it."