Sayyiduna Samurah bin Jundub (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) called for a cupper, and he cupped him with a horn and the incision of a blade. A Bedouin from Banu Fazarah saw him and said: "O Messenger of Allah, why do you let him cut your flesh?" He (peace and blessings be upon him) said: "Do you know what this cupping is? It is the best of what you treat yourselves with."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6755