Musnad Abu Ya'la al-Mawsili 150:434

Abu Bakr ibn Abi Shaybah narrated to us, Ali ibn Mushir narrated to us, from al-Shaybani, from Abd al-Rahman ibn al-Aswad, from his father, who said: I asked Aisha about the ruqyah (incantation) for a venomous sting. She said: The Messenger of Allah, may Allah bless him and grant him peace, granted a concession for the ruqyah for every possessor of a venomous sting.