[Machine] That they should shave their heads. Indeed, the Messenger of Allah and I used to perform ablution from the same vessel, and I would pour water over my head three times.
أَنْ يَحْلِقْنَ رُؤَسَهُنَّ لَقَدْ كُنْتُ أَنَا وَرَسُولُ اللهِ ﷺ نَغْتَسِلُ مِنْ إِنَاءٍ وَاحِدٍ فَلَا أَزِيدُ عَلَى أَنْ أُفْرِغَ عَلَى رَأْسِي ثَلَاثَ إِفْرَاغَاتٍ
"Aishah heard that 'Abdullah bin 'Amr was telling his wives to undo their braids (when they bathed). She said: 'How odd that Ibn 'Amr would do that! Why does he not tell them to shave their heads? The Messenger of Allah and I used to bathe from a single vessel, and I never did more than pour three handfuls of water over my head.'"
يَا عَجَبًا لاِبْنِ عَمْرٍو هَذَا أَفَلاَ يَأْمُرُهُنَّ أَنَّ يَحْلِقْنَ رُءُوسَهُنَّ لَقَدْ كُنْتُ أَنَا وَرَسُولُ اللَّهِ ﷺ نَغْتَسِلُ مِنْ إِنَاءٍ وَاحِدٍ فَلاَ أَزِيدُ عَلَى أَنْ أُفْرِغَ عَلَى رَأْسِي ثَلاَثَ إِفْرَاغَاتٍ
It was conveyed to 'A'isha that 'Abdullah b. 'Amr ordered the women to undo the (plaits) of hair on their heads. She said: How strange it is for Ibn 'Amr that he orders the women to undo the plaits of their head while taking a bath; why does he not order them to shave their beads? I and the Messenger of Allah ﷺ took bath from one vessel. I did no more than this that I poured three handfuls of water over my head. (Using translation from Muslim 331)
يَا عَجَبًا لِابْنِ عَمْرٍو وَهُوَ يَأْمُرُ النِّسَاءَ إِذَا اغْتَسَلْنَ أَنْ يَنْقُضْنَ رُءُوسَهُنَّ أَفَلَا يَأْمُرُهُنَّ أَنْ يَحْلِقْنَ لَقَدْ كُنْتُ أَنَا وَرَسُولُ اللهِ ﷺ نَغْتَسِلُ مِنْ إِنَاءٍ وَاحِدٍ فَمَا أَزِيدُ عَلَى أَنْ أُفْرِغَ عَلَى رَأْسِي ثَلَاثَ إِفْرَاغَاتٍ