Narrated Hisham: as the following Hadith 290. Narrated Abu Huraira: The Prophet said, "When a man sits in between the four parts of a woman and did the sexual intercourse with her, bath becomes compulsory."
Hadith ReferenceSahih Bukhari / The Book of Ghusl (Washing of the Whole Body) / Hadith: 291
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة