I want to Marry a Woman, but My Mother is not Pleased with My Choice

Question :

I wish to marry a girl, whom my father is pleased with. She has consented to my proposal and her family approves of the match. The only problem is that my mother has not consented and she is not pleased with the match. Do I marry this woman despite my mother's dissatisfaction or not? And if I do marry her, am I undutiful to my mother? Please help me; I pray that Allâh rewards you well.

Answer:

Because a mother's right is so great, being dutiful to her is A from the greatest of obligations, I advise you not to marry this woman. Remember that sincerest to a child is his mother, so perhaps she knows something about the character of this woman, a defect that will only bring you grief. Also remember that there are many other women out there. Allah Almighty said:
"And whosoever fears Allah and keeps his duty to Him, He will make a way for him to get out (from every difficulty) and provide for him from where he never expected it."

And without a doubt, being dutiful to one's mother is part of fearing Allah Almighty and keeping one's duty to Him. However, if the mother is not religious or is not a Muslim, and the proposed woman is, then you don't have to obey your mother in this case, because the Prophet ﷺ said :
"Indeed, obedience is only in what is good."

May Allah guide us all to what pleases Him. And may Allah make easy for you what is in your best interests in terms of safety, religion, and worldly matters.

Source:
Ibn Baz
Fatawa Islamiyah, Vol. 7 Pages 304-305