As the mistake was done because of the god Indra, he grants Hanuman a want that his system can be as strong as Indra's Vajra, Which his Vajra can also not damage him. Together with Indra other gods have also granted him needs: the God Agni granted Hanuman a wish https://posecin530dhj0.blogunteer.com/35940599/indicators-on-hanuman-you-should-know