It was narrated from Qais bin ‘Asim that he accepted Islam, and the Prophet commanded him to perform Ghusl with water and lotus leaves.
the Prophet came to visit ‘Abdullah bin Thabit (when he was sick) and found him very close to death. He called out to him and he did not respond, so the Messenger of Allah said: “Truly, to Allah we belong and truly, to Him we shall return,” and said: “We wanted you to live but we were overtaken by the decree of Allah, O Abu Ar-Rabi.” The women screamed and wept, and Ibn “Atik started telling them to quiet. The Messenger of Allah said: “Leave them; when the inevitable comes, no one should weep.” They said: “What is the inevitable, O Messenger of Allah?” He said: “Death.” His daughter said: “I had hoped that you would become a martyr, for you had prepared yourself for it.” The Messenger of Allah said: “Allah, the Mighty and Sublime, has rewarded him according to his intention. What do you think martyrdom is?” They said: “Being killed for the sake of Allah.” The Messenger of Allah said: “Martyrdom is of seven types besides being killed for the sake of Allah. The one who dies of the plague is a martyr; the one who is crushed by a falling building is a martyr; the one who is crusheds by a falling building is a martyr; the one who dies of pleurisy is a martyr; the one who dies of pleurisy is a martyr; the one who is burned to death is a martyr, and the woman who dies in pregnancy is a martyr.”
he accepted Islam and the Prophet ordered him to perform Ghusl with water and Sidr.