As the error was done from the god Indra, he grants Hanuman a desire that his system will 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 that https://arcade-directory.com/listings922219/helping-the-others-realize-the-advantages-of-hanuman