Sunan Abi Dawud Book 15, Hadith 16
Al-Rumaisa was the foster sister of Umm Sulaim.
Anas bin Malik said “Whenever the Apostle of Allaah(ﷺ) went to Quba, he used to visit Umm Haram daughter of Milhan who was married to ‘Ubadah bin Al Samit. One day when he visited her she gave him food an sat clearing his head of lice. The narrator narrated the rest of the tradition.
Abu Dawud said “Daughter of Milhan died in Cyprus”.
Umm Haram reported the Prophet(ﷺ) as saying “He who becomes sick on a stormy sea and vomits will have the reward of a martyr. And he who is drowned will have a reward of two martyrs.