That the Messenger of Allah ﷺ said: "Change the gray, and do not resemble the Jews." He said: There are narration on this topic from Az-Zubair, Ibn 'Abbas, Jabir, Abu Dharr, Anas, Abu Rimthah, Al-Jahdamah, Abu At-Tufail, Jabir bin Samurah, Abu Juhaifah, and Ibn 'Umar.  

قَالَ رَسُولُ اللَّهِ ﷺ غَيِّرُوا الشَّيْبَ وَلاَ تَشَبَّهُوا بِالْيَهُودِ قَالَ وَفِي الْبَابِ عَنِ الزُّبَيْرِ وَابْنِ عَبَّاسٍ وَجَابِرٍ وَأَبِي ذَرٍّ وَأَنَسٍ وَأَبِي رِمْثَةَ وَالْجَهْدَمَةِ وَأَبِي الطُّفَيْلِ وَجَابِرِ بْنِ سَمُرَةَ وَأَبِي جُحَيْفَةَ وَابْنِ عُمَرَ  

That the Prophet ﷺ said: "Indeed the best of what the gray may be changed with is Henna' and Katam."  

عَنِ النَّبِيِّ ﷺ قَالَ إِنَّ أَحْسَنَ مَا غُيِّرَ بِهِ الشَّيْبُ الْحِنَّاءُ وَالْكَتَمُ