The Messenger of Allah ﷺ visited all of his wives in a single night with just one bath.
أخبرنا إسحق بن إبراهيم ويعقوب بن إبراهيم واللفظ لإسحق قالا حدثنا إسمعيل بن إبراهيم عن حميد الطويل
أن رسول الله ﷺ طاف على نسائه في ليلة بغسل واحد
[Sahih] Related by Abu Dawud, chapter on purification, section on one in a state of major impurity returning [to relations], hadith no. 218, from the hadith of Ismail with this chain, and it is found in Al-Kubra, hadith no. 259. The hadith has many paths of transmission in Bukhari, Muslim, and others.