باب ما جاء في شيب رسول الله صلى الله عليه وسلم
5  
Appearing Of The White Hair Of Rasoolullah
Ash-Shama'il Al-Muhammadiyah 37
Qatada reports that he said:
‘I said to Anas ibn Malik: “Did Allah’s Messenger (Allah bless him and give him peace) dye his hair?” He replied: ‘He did not get to that, for he was grayed only in the hair covering his temples, but Abu Bakr (may Allah the Exalted be well pleased with him) dyed his hair with henna and a herbal mixture called katam.”
حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، قَالَ‏:‏ أَخْبَرَنَا أَبُو دَاوُدَ، قَالَ‏:‏ أَخْبَرَنَا هَمَّامٌ، عَنْ قَتَادَةَ، قَالَ‏:‏ قُلْتُ لأَنَسِ بْنِ مَالِكٍ‏:‏ هَلْ خَضَبَ رَسُولُ اللهِ صلى الله عليه وسلم‏؟‏ قَالَ‏:‏ لَمْ يَبْلُغْ ذَلِكَ، إِنَّمَا كَانَ شَيْبًا فِي صُدْغَيْهِ وَلَكِنْ أَبُو بَكْرٍ، خَضَبَ بِالْحِنَّاءِ وَالْكَتَمِ‏.‏
Grade: Sahih (Zubair Alizai)  صحيح   (Zubair Alizai) حكم   :
Reference : Ash-Shama'il Al-Muhammadiyah 37
In-book reference : Book 5, Hadith 1
Explanation
comments
Katm is a type of grass, which is used for dying the hair. Some people say that the colour of Katm is black, and if mixed with Hina it becomes red. Others say the colour of Katm is green, and when mixed with Hina it gives a black tint. Mulla Ali Qari says: 'The one that gives more colour is considered. If more Katm is used the dye becomes black and if more Hina is used, it becomes red'. The use of both colours are permissible, but black should not be used. It has been forbidden in the ahaadith to use a totally black dye.
Hadith Text
Reference