Sunan Ibn Majah
467
Sahih+3

Ibn 'Abbas narrated that his maternal aunt Maimunah said:"I brought a piece of cloth (for drying) to the Messenger of Allahwhen he performed a bath to cleanse himself from sexual impurity. He refused it and began to shake off water

SahihAl-Albani
SahihMuhammad Fouad Abd al-Baqi