First of all sometimes if one has few drinks with friends, now I have searched in Quran regarding this but where is it mentioned that this is haram. Could you provide quranic reference. Also every time Someobe drinks If they never go overboard and only have few drinks so what harm is that if They only drink to relax and don’t cause any harm to anyone.

Walaikumussalam brother
It is forbidden by Allah first it harms the one who drinks then it harms to others,ethically financially,socially and economically and it is proved today. you may read scientific research now in the light of quran kindly read following aayat and transactions.