Musnad Abu Ya'la al-Mawsili 109:206

Jabbara ibn Mughallis narrated to us, Abu Bakr al-Nahshali narrated to us, al-Haytham ibn Abi al-Haytham narrated to us, from Jabir, that the Messenger of Allah (peace and blessings of Allah be upon him) was cupped on the two jugular veins and between the two shoulders, and he gave the cupper his wage; and had it been forbidden, he would not have given it to him.