Sahih Al Bukhari (322)

عن زينب بنت أبي سلمة أن أم سلمة قالت: حضت وأنا مع النبي صلى الله عليه وسلم في الخميلة، فانسللت، فخرجت منها، فأخذت ثياب حيضتي فلبستها، فقال لي رسول الله صلى الله عليه وسلم: (أنفست). قلت: نعم، فدعاني، فأدخلني معه في الخميلة.

Zaynab bint Abu Salamah reported that Um-Salama said: "I got my menses while I was lying with the Prophet (peace be upon him) under a woollen sheet. So I slipped away, took the clothes for menses and put them on. Allah’s Messenger (peace be upon him) said: 'Have you got your menses?' I replied: 'Yes.' Then he called me and took me with him under the woollen sheet." Um Salamah further said: "The Prophet (peace be upon him) used to kiss me while he was fasting. The Prophet (peace be upon him) and I used to take the bath of Janaba from a single pot ."