Is it permissible for a husband to compel his wife to visit his mother against her wishes, even if she is tired or in her postpartum period, and would his action be considered an injustice to her that warrants her supplication against him?

You are not permitted to oppress your wife to please your mother; rather, give each of them her due. It is not permissible for you to force your wife to visit your mother, nor are you religiously obligated to compel her obedience in this matter, unless she wishes to do so willingly. It is preferable for her to do so, if there is no impediment, as it contributes to perfect companionship and good manners. Forcing her to visit while she is exhausted due to childbirth and giving her the choice between complying or having the child taken from her contains harshness, severity, and injustice, from which you must repent and seek your wife's forgiveness. The supplication of the oppressed is answered, so be keen to appease your wife. Let each of you treat the other well, and work to overcome problems with wisdom to preserve family cohesion.