Amr bin Shu'ayb narrates from his father, and he from his grandfather (may Allah be pleased with him), that the Prophet (peace and blessings be upon him) forbade plucking out white hair and said: "It is the light of Islam."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب القسم والنشوز / 14827
Amr bin Shu'ayb narrates from his father, and he from his grandfather (may Allah be pleased with him), that the Messenger of Allah (peace and blessings be upon him) said: "Do not pluck out white hairs, for there is no Muslim whose hair turns white in (the state of) Islam except that Allah, the Lord of Might, records a good deed for him and erases a sin."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب القسم والنشوز / 14828
Amr bin Shu'ayb narrates from his father, and he from his grandfather (may Allah be pleased with him), that the Messenger of Allah (peace and blessings be upon him) said: "Do not pluck out white hairs, for if old age comes to any one of you in the state of Islam (that is, his hair turns white), Allah, the Lord of Might, raises his rank, records a good deed for him and wipes away an evil deed."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب القسم والنشوز / 14829