Musnad Ahmad 482:25

Ali ibn Ishaq narrated to us, Abdullah informed us, Sa'id ibn Abi Ayyub informed us, he said: Abdullah ibn al-Walid narrated to us, from Abu al-Khayr, from Uqbah ibn Amir al-Juhani, he said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "There are three things in which there is a cure, if there is a cure in anything: in the incision of a cupper, or a drink of honey, or cauterization that strikes an ailment. But I dislike cauterization and I do not love it."