Sahih al-Bukhari, Hadith 1260 ⓘ
Narrated Hafsa bint Seereen: Um 'Atiyya said that they had entwined the hair of the daughter of Allah's Messenger in three braids. They first undid her hair, washed and then entwined it in three braids."
حَدَّثَنَا أَحْمَدُ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ وَهْبٍ، أَخْبَرَنَا ابْنُ جُرَيْجٍ، قَالَ أَيُّوبُ وَسَمِعْتُ حَفْصَةَ بِنْتَ سِيرِينَ، قَالَتْ حَدَّثَتْنَا أُمُّ عَطِيَّةَ ـ رضى الله عنها ـ أَنَّهُنَّ جَعَلْنَ رَأْسَ بِنْتِ رَسُولِ اللَّهِ صلى الله عليه وسلم ثَلاَثَةَ قُرُونٍ نَقَضْنَهُ ثُمَّ غَسَلْنَهُ ثُمَّ جَعَلْنَهُ ثَلاَثَةَ قُرُونٍ.
also referenced under: Book 23, Hadith 22 (In-Book) & Volume 2, Book 23, Hadith 350 (USC-MSA)