[Machine] The mothers of the believers used to borrow from each other and they would disclose their hair for one another. When the debt was paid, they would cast their hair over their faces again. Al-Hasan, Ash-Sha'bi, Tawus, and Mujahid disliked for a woman's servant to look at her hair, as if they considered it part of the adornment that should not be displayed to a servant, just as Ibn Abbas considered it part of the adornment that should not be displayed in front of non-mahrams. We also narrated from Ibrahim as-Sa'di who said, "I asked Nafi', 'Can a woman's servant comb her hair?'" He said, 'No, because they consider the servant to be a lost slave (i.e. they do not trust them) and the apparent meaning of the book (i.e. the Quran) takes precedence in following, along with what is mentioned in the Sunnah."  

كَانَتْ أُمَّهَاتُ الْمُؤْمِنِينَ يَكُونُ لِبَعْضِهِنَّ الْمُكَاتَبُ فَتَكْشِفُ لَهُ الْحِجَابَ مَا بَقِيَ عَلَيْهِ دِرْهَمٌ فَإِذَا قُضِيَ أَرْخَتْهُ دُونَهُ وَكَانَ الْحَسَنُ وَالشَّعْبِيُّ وَطَاوُسٌ وَمُجَاهِدٌ يَكْرَهُونَ أَنْ يَنْظُرَ الْعَبْدُ إِلَى شَعْرِ سَيِّدَتِهِ وَكَأَّنَهُمْ عَدُّوا الشَّعْرَ مِنَ الزِّينَةِ الَّتِي لَا تُبْدِيهَا لِعَبْدِهَا كَمَا عَدَّهُ ابْنُ عَبَّاسٍ ؓ فِيمَا رَوَيْنَاهُ مِنَ الزِّينَةِ الَّتِي لَا تُبْدِيهَا لِمَحَارِمِهَا وَرُوِّينَا عَنْ إِبْرَاهِيمَ الصَّائِغِ قَالَ قُلْتُ لِنَافِعٍ يُخْرِجُهَا عَبْدُهَا قَالَ لَا لِأَنَّهُمْ يَرَوْنَ الْعَبْدَ ضَيْعَةً وَظَاهِرُ الْكِتَابِ أَوْلَى بِالِاتِّبَاعِ مَعَ مَا فِيهِ مِنَ السُّنَّةِ