Hadith 609
Chapter 111: What was narrated about the obligation of bath when the two circumcised parts meet - كتاب الطهارة وسننها
حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، حَدَّثَنَا عُثْمَانُ بْنُ عُمَرَ، أَنْبَأَنَا يُونُسُ، عَنِ الزُّهْرِيِّ، قَالَ قَالَ سَهْلُ بْنُ سَعْدٍ السَّاعِدِيُّ أَنْبَأَنَا أُبَىُّ بْنُ كَعْبٍ، قَالَ إِنَّمَا كَانَتْ رُخْصَةً فِي أَوَّلِ الإِسْلاَمِ ثُمَّ أُمِرْنَا بِالْغُسْلِ بَعْدُ .
Ubayy bin Ka'b said:
"That was a concession that was granted in the early days of Islam, then we were commanded to have a bathe after that."
Reference : Sunan Ibn Majah 609
In-book reference : Book 1, Hadith 343