When Zainab the daughter of the Messenger of Allah (ﷺ) died, he said to us: Wash her odd number of times, i. e. three or five times, and put camphor or something-like camphor at the fifth time, and after you have washed her inform me. So we informed him and he gave us his under-garment, saying:" Put it next her body."
Reference: Sahih Muslim 939 f In-book : Book 11, Hadith 51 USC-MSA web (English) : Book 4, Hadith 2046 (deprecated)
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