Convince a person that keeping a beard is good

[Ahmad H]

Is it necessary to keep untrimmed beard or one can trim it to manageable size?

The Ahadith will give you the answer in this:

Ibn Umar said: The Apostle of Allah (may peace be upon him) said: Trim closely the moustache, and let the beard grow.
(Sahih Muslim)

So you should trim the moustache and let the beard grow. I say go and check what the scholars have said, and see if there are any past rulings on allowing the trimming of the beard. This is what I know. There are many other Ahadith on this matter from other Sahaba but I gave you the shortest one for clarity and simplicity.

 

[Tauheed123]

Assalaamu Alaikum,

JazakAllah Brother Ahmad For The Hadith. My Mom Complains About My Beard As Well Lol So I Know What It Feels Like