Sahih Muslim – Hadith No : 321

‘A’isha reported: I and the Messenger of Allah (may peace be upon him) took a bath from one vessel which was placed between me and him and he would get ahead of me, so that I would say: Spare (some water for) me, spare (some water for) me; and she said that they had had sexual intercourse.

Hadith In Arabic Text :

وحدثنا يحيى بن يحيى، أخبرنا أبو خيثمة، عن عاصم الأحول، عن معاذة، عن عائشة، قالت كنت أغتسل أنا ورسول الله، صلى الله عليه وسلم من إناء – بيني وبينه – واحد فيبادرني حتى أقول دع لي دع لي ‏.‏ قالت وهما جنبان ‏.‏

Chapter : The Book of Menstruation – كتاب الحيض