As the mistake was accomplished via the god Indra, he grants Hanuman a wish that his human body could be as potent as Indra's Vajra, and that his Vajra may not damage him. Coupled with Indra other gods have also granted him wishes: the God Agni granted Hanuman a wish https://directoryserp.com/listings13330300/not-known-factual-statements-about-hanuman