Musnad Abu Ya'la al-Mawsili 108:55

Abu Bakr narrated to us, Yunus ibn Muhammad narrated to us, from Mufaddal ibn Fadalah, from Habib ibn al-Shahid, from Muhammad ibn al-Munkadir, from Jabir ibn Abdullah: That the Messenger of Allah (peace and blessings of Allah be upon him) took the hand of a leper and placed it with his own in the food bowl. He then said, "Eat, in the name of Allah, trusting in Allah and relying upon Him."