Musnad Ahmad 462:11

Ibrahim ibn Abi al-Abbas narrated to us, Baqiyyah narrated to us, Buhayr ibn Sa’d narrated to us, Khalid ibn Ma’dan narrated to us, from al-Miqdam ibn Ma’di Karib, that he heard the Messenger of Allah, peace and blessings of Allah be upon him, say: "No one among you has eaten food more beloved to Allah, the Almighty and Majestic, than [that which is earned from] the work of his own hands."