Is it allowed for a person who has made hijrah to return to balad ul kufr in order to make da'wah with his parents who are kuffaar, but open to Islaam? Is this a valid reason to travel without making the hijrah unvalid?? It is not possible for the parents in this case to come and visit their daughter and son in law. Is there any fatwa on this topic, or does this case need a specific fatwa?