As the error was done from the god Indra, he grants Hanuman a want that his human body might be as robust as Indra's Vajra, Which his Vajra could also not damage him. In addition to Indra other gods have also granted him wishes: the God Agni granted Hanuman a https://sites.google.com/view/hanuman-temple-adelaide/gaushala-shewa-a-sacred-initiative-at-hanuman-temple-adelaide?read_current=1