Hadith #332 (Sunan Ibn Majah)
Book: The Book of Purification and its Sunnah
Narrator(s): al-Slt bin Dinar al-Azdy al-Hna'iy الصلت بن دينار, Ali bin Muhammad bin Ishaq al-Tanafasi علي بن محمد بن إسحاق الطنافسي, Uqba bin S'hban عقبة بن صهبان, Uthman ibn 'Affaan, Waki' bin al-Jarrah وكيع بن الجراح

The Prophet said: “The five daily prayers, from one Friday to the next, and fulfilling the trust are all expiation for whatever (sins) come between them.” I said: “What is fulfilling the trust?” He said: Having a bath to cleanse oneself from sexual impurity, for under every hair there is the state of sexual impurity.”

Source: https://parallelquran.com/hadith/sunan-ibn-majah-332/