As the mistake was carried out with the god Indra, he grants Hanuman a want that his overall body would be as powerful as Indra's Vajra, and that his Vajra also can not damage him. Together with Indra other gods have also granted him wishes: the God Agni granted Hanuman https://vashikaran60481.blogchaat.com/32829922/what-does-bajrang-baan-mean