It is narrated from Hazrat Anas (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) would sometimes visit all his pure wives in a single night with only one bath.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 13355
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد حسن.