All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His Slave and Messenger.
Marriage between a Muslim man or woman and a Hindu man or woman is unanimously invalid (see Fataawa 87895 and 84265).
With regard to the child that results from such a marriage, he is traced back to the father as long as he believes that this marriage is valid. However, the child must follow his Muslim parent in religion.
Besides, there is no impediment to embracing Islam by the Hindu spouse whether before or after the birth of the child.
With regard to the child’s embracing Islam, he is a Muslim as long as one of his parents is Muslim (see Fatwa 81957).
Finally, we draw your attention to the fact that the Muslim parent should accustom his child to virtues and acts of worship.