Musnad Abu Ya'la al-Mawsili 126:10

Abu Bakr ibn Abi Shaybah narrated to us, Husayn ibn Ali narrated to us, from Za'idah, from Abdullah ibn Abd al-Rahman, from Anas, who said: The Messenger of Allah (may Allah bless him and grant him peace) reclined at the home of Bint Milhan. He then dozed off, and he awoke while smiling. She said, "O Messenger of Allah, what are you smiling at?" He said, "Some people from my nation who ride upon this green sea, their likeness is like the kings upon thrones." I said, "O Messenger of Allah, supplicate to Allah that He makes me one of them." He said, "O Allah, make her one of them." She then married Ubadah ibn al-Samit and rode the sea with Bint Qurzah. When she returned, her mount stumbled with her, killing her, and she was buried.