Sunan an Nasai
378
Sahih+2

It was narrated from Al-Miqdam bin Shuraih, from his father, that 'Aishah said:"The Messenger of Allah (ﷺ) would put his mouth on the place from which I had drunk, and he would drink from my leftovers when I was menstruating

SahihAbu Ghuddah
SahihAl-Albani