ما هو الحديث النبوي الذي يحدد أعمار من يريدون صبغ الشعر الأبيض؟

The hadith of Jabir in Sahih Muslim indicates the desirability of changing gray hair with a dye other than black, such as henna and the like. This is not restricted to a specific age. It is reported by Ahmad and others that one should avoid black dye. However, if the hair color changes due to illness or similar reasons, it is permissible to dye it black, because that is restoring something to its original state.