بُلُوغُ الْمَرَامِ
Bulugh al-Maram 1026
Marriage
وَعَنْ أَنَسِ بْنِ مَالِكٍ - رضى الله عنه - { أَنَّ اَلنَّبِيَّ - صلى الله عليه وسلم -كَانَ يَطُوفُ عَلَى نِسَائِهِ بِغُسْلٍ وَاحِدٍ } أَخْرَجَاهُ , وَاللَّفْظُ لِمُسْلِمٍ [1] .
Narrated Anas bin Malik (RA): The Prophet (ﷺ) used to have intercourse with his wives (one after another), with a single bathing. [Agreed upon. The wording is Muslim's].
Sunnah.com reference: Book 8, Hadith 73