What is the ruling on a refugee sending a portion of the money allocated to him by social welfare to his family, and is he obliged to use this money only for purchasing household necessities?

It is important to seek clarification from the granting authority to determine the conditions for disbursing the grant. If the granting authority stipulated that the grant be disbursed for a specific item for a particular purpose, then this must be adhered to. However, if the specification was merely for simplification or because the beneficiary is often in need of those items, then the grantee may dispose of it for their other needs. Based on this, there is no harm in the action that was taken, and it is best to inquire with the granting authority.