As the error was carried out because of the god Indra, he grants Hanuman a wish that his overall body could be as powerful as Indra's Vajra, Which his Vajra may also not harm him. Coupled with Indra other gods have also granted him wishes: the God Agni granted Hanuman https://fernandoelrxd.affiliatblogger.com/89115611/considerations-to-know-about-hanuman