Musannaf Ibn Abi Shaybah

Hazrat Abu Rafi' says that the Messenger of Allah (peace and blessings be upon him) had intercourse with more than one wife in a single night and performed a separate ghusl for each one. I submitted, "O Messenger of Allah! Would it not have been sufficient if you had performed only one ghusl?" He replied, "This practice is purer and better."