Muhammad ibn Rumh ibn al-Muhajir and Yahya ibn Yahya narrated it to us; they said: Al-Layth informed us, from Yahya ibn Sa'id, from Ibn Habban, from Anas ibn Malik, from his maternal aunt Umm Haram bint Milhan, that she said: The Messenger of Allah, peace and blessings be upon him, slept one day near me, then woke up smiling. She said: I said, "O Messenger of Allah, what made you laugh?" He said, "People of my ummah were shown to me, riding upon the surface of this green sea." Then he mentioned something similar to the hadith of Hammad ibn Zayd.