As the mistake was done because of the god Indra, he grants Hanuman a wish that his overall body will be as potent as Indra's Vajra, and that his Vajra could also not hurt him. Coupled with Indra other gods have also granted him wishes: the God Agni granted Hanuman https://baglamukhi00011.creacionblog.com/36810720/hanuman-for-dummies