Hadith 4:704
'Abdah narrated to us, from Yahya bin Sa'id, from 'Arak bin Malik, from 'Abd al-Malik bin Abi Bakr, that Umm Salamah, the wife of the Prophet (may Allah bless him and grant him peace), used to say: "The Prophet (may Allah bless him and grant him peace) would wake up in a state of janabah (major ritual impurity) without having had a wet dream, and then he would wake up fasting."
حدثنا عبدة عن يحيى بن سعيد عن عراك بن مالك عن عبد الملك بن أبي بكر ان أم سلمة زوج النبي صلى الله عليه وسلم كانت تقول إن النبي صلى الله عليه وسلم كان يصبح جنبا من غير احتلام ثم يصبح صائما