Musnad Ahmad 1153:2153

Asbat narrated to us, he said: Al-Shaybani narrated to us, from Abd al-Rahman ibn al-Aswad, from his father, from Aisha, she said: "The Messenger of Allah, may Allah bless him and grant him peace, granted a concession regarding Ruqyah (incantation) for every possessor of a sting (venomous creature)."