Drinking from what is left from Wife’s Leftover

How to Treat Wife in Islam

`A’ishah reported: “I would drink when I was menstruating, then I would hand it (the vessel) to the Prophet (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 Prophet (ﷺ) and he would put his mouth where mine had been. Zuhair made no mention of (the Holy Prophet’s) drinking.” (Muslim)