وَعَنْ أَنَسٍ
قَالَ: كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يطوف على نِسَائِهِ وَبِغسْلِ وَاحِد
The Prophet (sallallahu alayhi wa sallam) used to have intercourse with his wives, with only a single washing.
Mishkat al-Masabih 423, Book 4, Purification, Hadith 159. 1 min read