As the mistake was finished with the god Indra, he grants Hanuman a desire that his human body can be as sturdy as Indra's Vajra, and that his Vajra can also not hurt him. In conjunction with Indra other gods have also granted him wishes: the God Agni granted Hanuman https://marcoeujyn.blogunok.com/37132367/little-known-facts-about-hanuman