"The Messenger of Allah prohibited that a woman should shave her head."  

نَهَى رَسُولُ اللَّهِ ﷺ أَنْ تَحْلِقَ الْمَرْأَةُ رَأْسَهَا  

But he did not mention "from Ali."  

عَنْ خِلاَسٍ نَحْوَهُ وَلَمْ يَذْكُرْ فِيهِ عَنْ عَلِيٍّ