It is narrated from Hazrat Aisha (may Allah be pleased with her) that sometimes a vessel would be presented to the Prophet (peace and blessings be upon him), I would be in my menstrual period and would drink from it, then the Prophet (peace and blessings be upon him) would take it and place his mouth at the same spot from where I had drunk. In the same way, I would take a bone and eat its meat, and the Prophet (peace and blessings be upon him) would take it and place his mouth at the same spot from where I had eaten. The previous hadith is also narrated through this second chain.