عَنْ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا قَالَتْ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ: ((إِذَا قَعَدَ بَيْنَ شُعَبِهَا الْأَرْبَعِ ثُمَّ أَلْزَقَ الْخِتَانَ بِالْخِتَانِ فَقَدْ وَجَبَ الْغُسْلُ))
Sayyida Aisha (may Allah be pleased with her) narrates that the Messenger of Allah (peace and blessings be upon him) said: When a man sits between the four parts of his wife and joins his circumcised part with her circumcised part, then ghusl becomes obligatory.