Sunan Ibn Majah #598 · The Book of Purification and its Sunnah

Sunan Ibn MajahAbu Ayyub Al-Ansari narrated that
Sunan Ibn Majah · Book 1 · The Book of Purification and its Sunnah
Sunan Ibn Majah · كتاب 1 · كتاب الطهارة وسننها
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
حَدَّثَنَا هِشَامُ بْنُ عَمَّارٍ، حَدَّثَنَا يَحْيَى بْنُ حَمْزَةَ، حَدَّثَنِي عُتْبَةُ بْنُ أَبِي حَكِيمٍ، حَدَّثَنِي طَلْحَةُ بْنُ نَافِعٍ، حَدَّثَنِي أَبُو أَيُّوبَ الأَنْصَارِيُّ، أَنَّ النَّبِيَّ ـ صلى الله عليه وسلم ـ قَالَ ‏
"‏ الصَّلَوَاتُ الْخَمْسُ وَالْجُمُعَةُ إِلَى الْجُمُعَةِ وَأَدَاءُ الأَمَانَةِ كَفَّارَةٌ لِمَا بَيْنَهَا ‏"‏ ‏.‏ قُلْتُ وَمَا أَدَاءُ الأَمَانَةِ قَالَ ‏"‏ غُسْلُ الْجَنَابَةِ فَإِنَّ تَحْتَ كُلِّ شَعَرَةٍ جَنَابَةً ‏"‏ ‏.‏
Reference : Sunan Ibn Majah 598In-book reference : Book 1, Hadith 332