Hadith 137

Bulugh al-Maram

Book 1: The Book of Purification

Chapter 8

Taking Ghusl (bath) And the precepts regarding Sexual Impurity

باب الغسل وحكم الجنب

Bulugh al-Maram 113
وَأَصْلُهُ مُتَّفَقٌ عَلَيْه ِ 1‏ .‏
and its origin is in Al-Bukhari and Muslim.