Is it permissible to marry a second wife to fulfill the need of raising children, despite religious obligations and insufficient income, and assuming that the second wife will improve the situation?

If you are poor and unable to spend, you are not permitted to marry a second wife unless your first wife is insufficient for you and you fear falling into sin, provided you inform the second wife of your financial situation. It is important to consider this matter carefully, as being content with one wife may be more beneficial to avoid the fragmentation of the family and the loss of children. Work with your current wife to achieve a stable marital life based on understanding, respect, and each party fulfilling their duties, while being careful not to intentionally err and to overlook minor faults. Raising children is an important matter and a duty for both parents, requiring cooperation and agreement between them.