Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates: The Prophet Muhammad (peace and blessings be upon him) commanded to trim the moustache short and to let the beard grow.
(Imam Ibn Hibban, may Allah have mercy on him, says:) Imam Malik has not narrated any hadith from Abu Bakr bin Nafi’ except this narration, and the name of Abu Bakr bin Nafi’ is Umar.