Question to Al-Imām Ibn Bāz (rahimahullāh): Noble Shaikh, do you have any advice to fathers who refuse proposals of marriage (for their daughters) from righteous men?
Answer: Yes. It is obligatory upon a guardian (waliyy) to choose for his ward or daughter a righteous man – and he should not refuse a man who is pious due to him being a relative or a non-relative. Rather, he should choose someone whom he is pleased with in his religion and character even if he is not related – this is what is obligatory upon a waliyy, whether he’s the father or other than him. Likewise, it is obligatory upon the woman that she strives to accept a proposal from a man who is good in his Religion, and fine and pleasant in his character – and she should not accept a proposal for marriage from one who is not good in his religion or his character even if he happens to be a relative.
Fatāwā Noor ‘alad-Darb, 20/151.