Allah's Apostle said, "Cut the moustaches short and leave the beard (as it is)."Bukhari 7:781
The Messenger of Allah said: Trim closely the moustache, and grow beard, and thus act against the fire-worshippers.Muslim
The Prophet said, "There will emerge from the East some people who will recite the Qur'an but it will not exceed their throats and who will go out of (renounce) the religion (Islam) as an arrow passes through the game, and they will never come back to it unless the arrow, comes back to the middle of the bow (by itself) (i.e., impossible)." The people asked, "What will their signs be?" He said, "Their sign will be the habit of shaving (of their beards)." Bukhari 9:651
Rasulullah (Sallallahu Alayhi Wasallam) said "I have no connection iwth one who shaves, shouts and tears his clothing eg. in grief or affication."
- Reported by Abu Darda (R.A.) in Muslim
Rasulullah (Sallallahu Alayhi Wasallam)said: "Act against contrary to the polythesists, trim closely the moustache and grow the beard."
- Reported by Ibn Umar (R.A.) in Muslim
Rasulullah (Sallallahu Alayhi Wasallam) said: "Anyone who shaves has no claim to the mercy of Allah"
- Reported by Ibn Abbas (R.A.) in Tibrabi
All of the above hadiths tell the believing Muslim man to grow his beard and trim his mustache. Not too hard right? A lot of people think that because these are hadith that its optional and not required but as we all know the Quran tells us to obey the Messenger:
"O ye who believe! Obey Allah, and obey the Messenger, and those charged with authority among you." (Quran 4:59)
"O ye who believe! Obey Allah and His Messenger, and turn not away from him when ye hear (him speak)." (Quran 8:20)
"O ye who believe! give your response to Allah and His Messenger, when He calleth you to that which will give you life; and know that Allah cometh in between a man and his heart, and that it is He to Whom ye shall (all) be gathered."(Quran 8:24)
"Ye have indeed in the Messenger of Allah an excellent exempler for him who hopes in Allah and the Final Day, and who remembers Allah." (Quran 33:21)
"What Allah has bestowed on His Messenger (and taken away) from the people of the townships,- belongs to Allah,- to His Messenger and to kindred and orphans, the needy and the wayfarer; in order that it may not (merely) make a circuit between the wealthy among you. So take what the Messenger gives you, and refrain from what he prohibits you. And fear Allah: for Allah is strict in Punishment." (Quran 59:7)
There will always be argument about this topic. People will say that they can't grow a beard because it will cost them a job or a promotion, but isn't obeying Allah more important than anything? Also, brothers will say that when they do grow a beard it looks strange or does not grow in fully. The answer to this is simple. As long as you don't shave, you are fine, so just grown what you can grow and say Alhamdulilah. Yusuf Estes tells a story that a brother came to him and asked him if he had to grow a beard, and Yusuf Estes answered him saying 'no, just don't cut it'.
The one thing that drives me absolutly crazy is seeing a Muslim man with JUST a mustache! Isn't that like doing opposite of what he has been commanded to do? Why would you do that? I also wonder about brothers who have the 'fashion' beard that is just a goatee or shaved real short, are they that vain that they can't grow a full beard for the sake of their creator?
So there you have it. May Allah guide all of our brothers in Islam to grow a beard as our wonderful Prophet did.