The ruling on using a gift if it is established to be stolen

You also say: We have a relative who brings us some simple household items, and these are items that people usually sell. We offered him money, but he did not accept it and considered the item a gift. After a while, we used these items and it became clear to us that he had stolen them from a foreign company where he works as a guard. What is the ruling on our using these items after we learned that they were stolen?
Answer: Once you know that these items are stolen, it is obligatory for you to return them to their owners; because this is wrong, and forbidding what is wrong is obligatory. So, if you know that they are stolen, return them to their owners, and tell him that this is not permissible for him, and that it is obligatory for him to fulfill the trust with the company and with others. May Allah help us. Yes.