ENOfficial
‘Ali said God's messenger forbade that a woman should shave her head. Nasa'i transmitted it.
Source: sunnah.com
Other translations
Arabic
وَعَنْ عَلِيٍّ قَالَ: نَهَى رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَنْ تَحْلِقَ الْمَرْأَةُ رَأْسَهَا. رَوَاهُ النَّسَائِيُّ
sunnah.com