Musnad Ahmad 1153:1721

Waki' narrated to us, Sufyan narrated to us, from al-Shaybani, from 'Abd al-Rahman ibn al-Aswad, from his father, from 'A'ishah, who said: "The Messenger of Allah, may Allah bless him and grant him peace, granted a concession regarding Ruqyah (incantation) for every possessor of a venomous sting."