Man Lā Yaḥḍuruh al-Faqīh
Hadith 274276 - وَ دَخَلَ اَلْحَسَنُ بْنُ اَلْجَهْمِ عَلَى أَبِي اَلْحَسَنِ مُوسَى بْنِ جَعْفَرٍ عَلَيْهِ اَلسَّلاَمُ: وَ قَدِ اِخْتَضَبَ بِالسَّوَادِ فَقَالَ «إِنَّ فِي اَلْخِضَابِ أَجْراً وَ اَلْخِضَابُ وَ اَلتَّهْيِئَةُ مِمَّا يَزِيدُ اَللَّهُ عَزَّ وَ جَلَّ فِي عِفَّةِ اَلنِّسَاءِ وَ لَقَدْ تَرَكَتْ نِسَاءٌ اَلْعِفَّةَ بِتَرْكِ أَزْوَاجِهِنَّ اَلتَّهْيِئَةَ» فَقَالَ لَهُ بَلَغَنَا أَنَّ اَلْحِنَّاءَ تَزِيدُ فِي اَلشَّيْبِ فَقَالَ «أَيُّ شَيْءٍ يَزِيدُ فِي اَلشَّيْبِ وَ اَلشَّيْبُ يَزِيدُ فِي كُلِّ يَوْمٍ»
Hadith.276 - Al-Hasan ibn al-Jahm entered upon Abu Al-Hasan Imam Musa ibn Jafar Al-Kadhim (as) who had dyed his hair with black dye.
Imam (as) said: "Indeed, there is a reward in dyeing. Dyeing and grooming are among those things which increase the chastity of women, and some women have abandoned chastity because their husbands have neglected grooming themselves."
(ibn Al-Jahm) replied to Him: "We have heard that henna increases gray hair?”
Imam (as) said: “What increases gray hair? Gray hair increases every day."