(3) باب جَوَازِ غَسلِ الْحَائِضِ رَأْسَ زَوْجِهَا وَتَرْجِيلِهِ وَطَهَارَةِ سُؤْرِهَا وَالاِتِّكَاءِ فِي حِجْرِهَا وَقِرَاءَةِ الْقُرْآنِ فِيهِ
'A'isha reported:
I would drink when I was menstruating, then I would hand it (the vessel) to the Apostle (ﷺ) 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 (ﷺ) and he would put his mouth where mine had been. Zuhair made no mention of (the Holy Prophet's) drinking.
Reference: Sahih Muslim 300
In-book reference: Book 3, Hadith 14
USC-MSA web (English) reference(deprecated numbering scheme): Book 3, Hadith 590