Musnad Ahmad 785:21

Hushaym ibn Bashir narrated to us, from Ya'la ibn 'Ata, from 'Amr ibn al-Sharid, from his father, who said: There was a man with leprosy among the delegation of Thaqif. The Prophet, peace and blessings of Allah be upon him, sent word to him, "Return, for I have accepted your pledge of allegiance."