عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " إِذَا جَلَسَ بَيْنَ شُعَبِهَا الأَرْبَعِ ثُمَّ جَهَدَهَا، فَقَدْ وَجَبَ الْغَسْلُ ".
Abu Hurairah reported: The Prophet ﷺ said, “When he sits between her four limbs and then exerts himself with her, the ritual bath (ghusl) has become obligatory.”