Abu Juhayfa al-Sawai' · The Book of Purification and its Sunnah

One of the wives of the Prophet took a bath to cleanse herself from sexual impurity, then the Prophet performed ablution and had a bath with the water left over from her ablution."

"The Messenger of Allah used to command us not to take off our leather socks for three days except in the case of sexual impurity, but not in the case of defecation, urine or sleep (i.e. during travel)."

"The Messenger of Allah used to have a bath to cleanse himself from sexual impurity, then he would warm himself with me before I had the bath."