It is narrated from the Mother of the Believers, Sayyidah Umm Salamah (may Allah be pleased with her), that the Prophet (peace and blessings be upon him) would reach the morning in a state of major impurity (janabah) not caused by a wet dream (that is, due to intercourse); then he would take a ritual bath (ghusl) and fast.
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Shu'bah, from Amr bin Murrah, except Abd al-Malik al-Juddi."