Sahih Muslim , Hadith 2102

Jabir reported that when Abu Qubafa (father of Abu Bakr) came in the yeu of Victory or on the Day of Victory (to the Prophet to pledge his allegiance to him) his head and his beard were white like hyssop. He (the Holy Prophet) commaded or the women were commanded by him that they should change this with something (that the colour of his hair should be changed).

حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، أَخْبَرَنَا أَبُو خَيْثَمَةَ، عَنْ أَبِي الزُّبَيْرِ، عَنْ جَابِرٍ، قَالَ أُتِيَ بِأَبِي قُحَافَةَ أَوْ جَاءَ عَامَ الْفَتْحِ أَوْ يَوْمَ الْفَتْحِ وَرَأْسُهُ وَلِحْيَتُهُ مِثْلُ الثَّغَامِ أَوِ الثَّغَامَةِ فَأَمَرَ أَوْ فَأُمِرَ بِهِ إِلَى نِسَائِهِ قَالَ ‏ "‏ غَيِّرُوا هَذَا بِشَىْءٍ ‏" ‏ ‏.‏

sunnah.com

Jabir b. 'Abdullah reported that Abu Qubafa was led (to the andience of the Holy Prophet) on the day of the Conquest of Mecca and his head and beard were white like hyssop, whereupon Allah's Messenger said: Change it with something but avoid black.

وَحَدَّثَنِي أَبُو الطَّاهِرِ، أَخْبَرَنَا عَبْدُ اللَّهِ بْنُ وَهْبٍ، عَنِ ابْنِ جُرَيْجٍ، عَنْ أَبِي الزُّبَيْرِ، عَنْ جَابِرِ بْنِ عَبْدِ اللَّهِ، قَالَ أُتِيَ بِأَبِي قُحَافَةَ يَوْمَ فَتْحِ مَكَّةَ وَرَأْسُهُ وَلِحْيَتُهُ كَالثَّغَامَةِ بَيَاضًا فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ غَيِّرُوا هَذَا بِشَىْءٍ وَاجْتَنِبُوا السَّوَادَ ‏" ‏ ‏.‏

sunnah.com