We washed her an odd number of times, i. e. three, five or seven times; and Umm 'Atiyya (further) said: We braided her hair in three plaits.
Sahih Muslim Book 11, Hadith 50
← Previous Hadith " three times, five times, seven times, or more than that, if you deem fit:" Hafsa (further) said on the authority of Umm 'Atiyya: We braided (the hair) of her head in three plaits.

Sahih Muslim Book 11, Hadith 49 Next Hadith → 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."

Sahih Muslim Book 11, Hadith 51