Authentic
graded by Al-Albani
Mishkat al-Masabih 4421
Narrator:Abdullāh ibn ‘Umar
وَعَنِ ابْنِ عُمَرَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ:
" خَالِفُوا الْمُشْرِكِينَ: أَوْفِرُوا اللِّحَى وَأَحْفُوا الشَّوَارِبَ "
Ibn ‘Umar reported God’s messenger as saying, "Do the opposite of what the polytheists do ; let the beard grow long and clip the moustache.” A version has, “Cut the moustache down and leave the beard.” (Bukhari and Muslim.)
Cited in Mishkat al-Masabih (No. 4421).