It is narrated from the Mother of the Believers, Sayyidah Aishah (may Allah be pleased with her), that the Prophet (peace and blessings be upon him) would reach the morning in a state of major ritual impurity (janabah) not caused by a wet dream, then he would perform the ritual bath (ghusl) and fast.
Imam al-Tabarani (may Allah have mercy on him) said: "Ayyub did not narrate any hadith from Yazid besides this one, and he heard this hadith only from this Shaykh (Yazid al-Rishk)."