As the error was carried out because of the god Indra, he grants Hanuman a wish that his overall body will be as sturdy as Indra's Vajra, Which his Vajra can also not damage him. In addition to Indra other gods have also granted him needs: the God Agni granted https://hanumanmandirsouthaustralia.travel.blog/2024/09/29/exploring-the-hindu-temples-in-south-australia-a-spiritual-journey/