Trim the mustaches and grow the beards. [Sahih/Authentic] - [Al-Bukhari and Muslim. This is the wording of Muslim]
"«أحْفُوا الشَّوَارِبَ وأَعْفُوا اللِّحَى». [صحيح] - [متفق عليه، وهذا لفظ مسلم.]"