As the error was completed by the god Indra, he grants Hanuman a desire that his overall body could be as potent as Indra's Vajra, Which his Vajra could also not damage him. Together with Indra other gods have also granted him needs: the God Agni granted Hanuman a desire https://immensedirectory.com/listings873469/not-known-factual-statements-about-hanuman