As the mistake was completed by the god Indra, he grants Hanuman a want that his human body could be as sturdy as Indra's Vajra, and that his Vajra also can not harm him. As well as Indra other gods have also granted him wishes: the God Agni granted Hanuman https://www.tumblr.com/hanumanmandiradelaide/747945667911122944/a-pinnacle-of-hindu-worship-in-adelaide