As the mistake was done because of the god Indra, he grants Hanuman a want that his system can be as robust as Indra's Vajra, Which his Vajra also can not hurt him. As well as Indra other gods have also granted him needs: the God Agni granted Hanuman a https://baglamukhi-shabar-mantra72605.idblogz.com/33298367/hanuman-for-dummies