As the error was carried out because of the god Indra, he grants Hanuman a want that his system will be as strong as Indra's Vajra, and that his Vajra also can not damage him. Coupled with Indra other gods have also granted him needs: the God Agni granted Hanuman https://williamn307vya6.blognody.com/41383067/the-definitive-guide-to-hanuman