Is it permissible to marry off one's son using Zakat funds if he is a student of knowledge who possesses no wealth, knowing that his father may not be able to marry him off?

It is permissible, according to Islamic law, for you to give your child from your Zakat wealth to help him marry or to improve his situation, because you are not legally obligated to cover his marriage expenses. Scholars have stipulated the permissibility of giving Zakat for expenses that are not obligatory upon the giver, but are needed by the poor person.