Sahih Bukhari Volume 7, Book 71, Hadith Number 617.

Narrated By Anas bin Malik: Allah’s Apostle allowed one of the Ansar families to treat persons who have taken poison and also who are suffering from ear ailment with Ruqya. Anas added: I got myself branded cauterized) for pleurisy, when Allah’s Apostle was still alive. Abu Talha, Anas bin An-Nadr and Zaid bin Thabit witnessed that, and it was Abu Talha who branded (cauterized) me.