From Sahih Bukhari (Hadith 1258):
Narrated Muhammad:Um 'Atiyya said, "One of the daughters of the Prophet (ﷺ) died and he came out and said, 'Wash her three or five times or more, if you think it necessary, with water and Sidr, and last of all put camphor (or some camphor) and when you finish, inform me.' " Um Atiyya added, "When we finished we informed him and he gave us his waist-sheet and said, 'Shroud her in it.' " And Um 'Atiyya (in another narration) added, "The Prophet (ﷺ) said, 'Wash her three, five or seven times or more, if you think it necessary.' " Hafsa said that Um 'Atiyya had also said, "We entwined her hair into three braids
Reference: Bukhari 1258