As the error was done from the god Indra, he grants Hanuman a desire that his human body would be as robust as Indra's Vajra, and that his Vajra may not harm him. As well as Indra other gods have also granted him wishes: the God Agni granted Hanuman a https://medium.com/@HinduTempleAdelaide/exploring-the-sacred-mandirs-of-adelaide-a-spiritual-journey-477f3978fef3