As the error was accomplished by the god Indra, he grants Hanuman a want that his human body could be as powerful as Indra's Vajra, Which his Vajra may not damage him. In addition to Indra other gods have also granted him wishes: the God Agni granted Hanuman a desire https://mua60482.theideasblog.com/37599258/the-basic-principles-of-hanuman