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In page Uthman:

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After the body of Uthman had been in the house for three days[citation needed], Na'ila approached some of his supporters to assist in his burial, but only about a dozen people responded, including Marwan, Zayd ibn Thabit, Huwatib bin Alfarah, Jubayr ibn Mut'im, Abu Jahm bin Hudaifa, Hakim bin Hazam and Niyar bin Mukarram.[1] The body was lifted at dusk, and because of the blockade, no coffin could be procured. The body was not washed. Thus, Uthman was carried to the graveyard in the clothes that he was wearing at the time of his assassination.[2]