As the error was accomplished by the god Indra, he grants Hanuman a want that his body could well be as potent as Indra's Vajra, Which his Vajra also can not harm him. Together with Indra other gods have also granted him needs: the God Agni granted Hanuman a wish https://manuelbrbhf.wizzardsblog.com/37002780/the-5-second-trick-for-hanuman