Musnad Ahmad 33:469

Hujayn and Yunus narrated to us, they said: Layth ibn Sa'd narrated to us, from Abu al-Zubayr, from Jabir ibn Abdullah, that a man from the Ansar said: "Is there a ruqyah (incantation/healing prayer) for the scorpion?" The Messenger of Allah, peace and blessings of Allah be upon him, said: "Whoever among you is able to benefit his brother, let him do so."