من لا يحضره الفقيه, volume 1, page 122

Hadith.274 - The Commander of the Faithful Imam Ali ibn Abi Talib (as) said: "Dyeing (the hair or beard) is the tradition of Muhammad (sw) and it is part of the Sunnah."

Translation: Bab Ul Qaim Publications — attributed by Thaqalayn·The Arabic above is the original.

Hadith.276 - Al-Hasan ibn al-Jahm entered upon Abu Al-Hasan Imam Musa ibn Jafar Al-Kadhim (as) who had dyed his hair with black dye. Imam (as) said: "Indeed, there is a reward in dyeing. Dyeing and grooming are among those things which increase the chastity of women, and some women have abandoned chastity because their husbands have neglected grooming themselves." (ibn Al-Jahm) replied to Him: "We have heard that henna increases gray hair?” Imam (as) said: “What increases gray hair? Gray hair increases every day."

Translation: Bab Ul Qaim Publications — attributed by Thaqalayn·The Arabic above is the original.

Hadith.277 - Muhammad ibn Muslim asked Imam Muhammad ibn Ali Al-Baqir (as) about dyeing the hair, and He said: "The Messenger of Allah (sw) used to dye, and we still have some of his hair with us."

Translation: Bab Ul Qaim Publications — attributed by Thaqalayn·The Arabic above is the original.

Hadith.278 - It is reported that The Prophet (sw) had seventeen gray hairs in his head and beard.

Translation: Bab Ul Qaim Publications — attributed by Thaqalayn·The Arabic above is the original.

Hadith.279 - The Prophet, Imam Hussain ibn Ali (as) and Imam Muhammad ibn Ali Al-Baqir (as) used to dye their hair with katam (a plant-based dye often used in combination with henna to produce a darker color).

Translation: Bab Ul Qaim Publications — attributed by Thaqalayn·The Arabic above is the original.

Hadith.280 - And Imam Ali ibn Al-Hussain (as) used to dye his hair with both henna and Al-Katam (plant-based black)."

Translation: Bab Ul Qaim Publications — attributed by Thaqalayn·The Arabic above is the original.