Umm Haram bint Milhan (may Allah be pleased with her) said: One day the Prophet (peace and blessings be upon him) was taking a midday rest in my house, and when he woke up he was smiling. I asked: What has made you smile? He (peace and blessings be upon him) said: "People of my Ummah were shown to me riding upon the sea like kings seated on thrones." I said: Pray that Allah includes me among them. He (peace and blessings be upon him) prayed and lay down again. Then, after waking up, he said the same, and I again asked him to pray, and he (peace and blessings be upon him) said: "You are among the first ones." Then Ubadah bin al-Samit (may Allah be pleased with him) married her and took her on a sea voyage. When they were returning, her neck broke from a fall from a mule, and this caused her death.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / 18535