What is the religious ruling on a husband giving his son, who is not yet 10 days old, to his infertile brother to raise, despite the mother's refusal and the fact that the child will not be registered under the brother's name?

Child custody is a right belonging to both parents as long as the marital bond exists. It is not permissible for the husband to seize sole custody without his wife's consent, or to hand over the child to his brother for upbringing without her approval.