Purification (Kitab Al-Taharah)
Dawud :: Book 1 : Hadith 68
Narrated Abdullah ibn Abbas:
One of the wives of the Prophet (peace_be_upon_him) took a bath from a large bowl. The Prophet (peace_be_upon_him) wanted to perform ablution or take from the water left over. She said to him: O Prophet of Allah, verily I was sexually defiled. The Prophet said: Water not defiled.