كتاب الزينة من السنن
Read the English translation first, with the original Arabic directly underneath.
It was narrated from Ibn 'Umar:
That the Messenger of Allah [ﷺ] said: "Trim the mustache and let the beard grow."
أَحْفُوا الشَّوَارِبَ وَأَعْفُوا اللِّحَى