Sahih al-Bukhari 2072

Ibrahim ibn Musa informed us: Isa informed us, from Thawr, from Khalid ibn Madan, from al-Miqdam, may Allah be pleased with him, from the Messenger of Allah, peace and blessings be upon him, who said: “No one has ever eaten food better than what he earns through the work of his own hands. The Prophet of Allah, David, peace be upon him, used to eat from the work of his own hands.”