كتاب الزينة من السنن
Read the English translation first, with the original Arabic directly underneath.
It was narrated that Ibn 'Umar said:
"The Messenger of Allah [ﷺ] said: 'Change gray hair, but do not imitate the Jews.'"
غَيِّرُوا الشَّيْبَ وَلاَ تَشَبَّهُوا بِالْيَهُودِ