Sahih Muslim, Chapter: The Book of Menstruation (Kitab Al-Haid)

I would drink when I was menstruating, then I would hand it (the vessel) to the Apostle (may peace be upon him) and he would put his mouth where mine had been, and drink, and I would eat flesh from a bone when I was menstruating, then hand it over to the Apostle (may peace be upon him) and he would put his mouth where mine had been. Zuhair made no mention of (the Holy Prophet's) drinking.