Musnad Ahmad 33:168

Abu Qatan and Rawh narrated to us, they said: Hisham narrated to us, Rawh ibn Abi Abd Allah said: From Abu al-Zubayr, from Jabir ibn Abd Allah, "That the Messenger of Allah (may Allah bless him and grant him peace) was cupped while he was in the state of ihram, due to a sprain that was in his hip - or his back."