Sayyiduna Jabir (may Allah be pleased with him) visited al-Muqanna' in his illness and then said: I will not leave until he gets cupped, for I heard the Messenger of Allah (peace and blessings be upon him) say: "There is cure in it."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19523