As the mistake was completed with the god Indra, he grants Hanuman a want that his physique would be as solid as Indra's Vajra, and that his Vajra also can not harm him. Together with Indra other gods have also granted him wishes: the God Agni granted Hanuman a wish https://laxmi09764.bloggadores.com/36091341/little-known-facts-about-hanuman