Sayyidina Anas (RA) reported that Allah’s Messenger used to visit Sayyidah Umm Haram bint Milhan. She used to cook food for her. She was the wife of Sayyidina Ubadah ibn Samit. So, one day he went to her and she fed him and delayed him so that she could examine his head for lice. He went to sleep. When he woke up, he laughed. She asked, “What has made you laugh. 0 Messenger of Allah?” He said, “Some people of my ummah were shown to me waging battle in Allah’s cause riding on planks as kings” or he said, “Like kings sitting on planks.” Sayyidah Umm Haram submited, “0 Messenger of Allah, pray to Allah that. He may cause me to be among them.” He prayed for her. After that, he put down his head and went to sleep. Again, he awoke laughing. She asked him, “What makes you laugh, 0 Messenger of Allah?” He said, “Some people of my ummah were presented to me fighting a bathe in Allah’s cause,” and he said like what he had said before. She said, “0 Messenger of Allah, pray to Allah that he should make me one of them.” He said, “You are among the first ones.” Thus Sayyidah Umm Haram sailed the sea in the times of Sayyidina Mu’awiyah ibn Abu Sufyan 1 hut when she came out, she fell down from her riding beast (and was martyred).
[Bukhari 2788, Muslim 1912]