Narrated by:Abu Hurairah that
It was narrated from Abu Hurairah that:The Messenger of Allah said: "When a man sits between the four parts (arms and legs of his wife) and has intercourse, then bath is obligatory."
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا الْفَضْلُ بْنُ دُكَيْنٍ، عَنْ هِشَامٍ الدَّسْتَوَائِيِّ، عَنْ قَتَادَةَ، عَنِ الْحَسَنِ، عَنْ أَبِي رَافِعٍ، عَنْ أَبِي هُرَيْرَةَ، عَنْ رَسُولِ اللَّهِ ـ صلى الله عليه وسلم ـ قَالَ " إِذَا جَلَسَ الرَّجُلُ بَيْنَ شُعَبِهَا الأَرْبَعِ ثُمَّ جَهَدَهَا فَقَدْ وَجَبَ الْغُسْلُ " .
IbnMaja
The Book of Purification and its Sunnah • Hadith 610