Hadith 15:445
Abu Bakr narrated to us, he said: Waki’ narrated to us, from Hisham ibn Yazid, from al-Qasim ibn Muslim, the freed slave of al-Hasan ibn Ali, who said: Ali asked for a drink, so I brought him a drink and I blew into it. He refused to drink it and said: "You drink it."
حدثنا أبو بكر قال حدثنا وكيع عن هشام بن يزيد عن القاسم بن مسلم مولى الحسن بن علي قال استسقى علي فأتيته بشراب فنفخت فيه فأبى أن يشربه وقال اشربه أنت