The Book of Purification and its Sunnah
1/124. Chapter:
How a menstruating woman should bathe
Sunan Ibn Majah
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، وَعَلِيُّ بْنُ مُحَمَّدٍ، قَالاَ حَدَّثَنَا وَكِيعٌ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، أَنَّ النَّبِيَّ ـ صلى الله عليه وسلم ـ قَالَ لَهَا وَكَانَتْ حَائِضًا " انْقُضِي شَعْرَكِ وَاغْتَسِلِي " . قَالَ عَلِيٌّ فِي حَدِيثِهِ " انَقُضِي رَأْسَكِ " .
It was narrated from 'Aishah that: The Prophet said to her, when she was menstruating: "Undo your braids and bathe." (Sahih)(A narrator) 'Ali said in his narration: "Undo your head."
Reference : Sunan Ibn Majah 641In-book reference : Book 1, Hadith 375English translation : Vol. 1, Book 1, Hadith 641