Musnad Ahmad 33:985

Rawh narrated to us, Ibn Jurayj narrated to us, Abu al-Zubayr informed me that he heard Jabir ibn Abdullah saying: A scorpion stung a man among us while we were sitting with the Prophet, may God bless him and grant him peace. A man said: "O Messenger of God, shall I perform ruqyah (incantation) for him?" He said: "Whoever among you is able to benefit his brother, let him benefit him."