It was narrated from 'Abdullah bin Buraidah that:

He heard that the Messenger of Allah ﷺ said: "The best things with which you can change gray hair are Henna and Katam."

أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ الأَعْلَى، قَالَ حَدَّثَنَا الْمُعْتَمِرُ، قَالَ سَمِعْتُ كَهْمَسًا، يُحَدِّثُ عَنْ عَبْدِ اللَّهِ بْنِ بُرَيْدَةَ، أَنَّهُ بَلَغَهُ أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ " إِنَّ أَحْسَنَ مَا غَيَّرْتُمْ بِهِ الشَّيْبَ الْحِنَّاءُ وَالْكَتَمُ " .