It is narrated from the Mother of the Believers, Sayyidah Aishah (may Allah be pleased with her), that the Messenger of Allah (peace and blessings be upon him) would sometimes reach the morning in a state of major ritual impurity (janabah) without a wet dream (due to intimacy with his wives), then he would perform the ritual bath (ghusl) and fast that day.
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Yahya bin Sa'id (may Allah have mercy on him) except Ali bin Asim; Ali bin Shu'ayb is alone in narrating it."