As the error was carried out by the god Indra, he grants Hanuman a would like that his body will be as potent as Indra's Vajra, and that his Vajra also can not damage him. Along with Indra other gods have also granted him wishes: the God Agni granted Hanuman https://prspotlightonline.blogspot.com/2024/09/discovering-heart-of-hindu-community-in.html