As the error was finished by the god Indra, he grants Hanuman a want that his body will be as powerful as Indra's Vajra, and that his Vajra may also not harm him. Coupled with Indra other gods have also granted him wishes: the God Agni granted Hanuman a desire https://share.evernote.com/note/d4fdfcaa-2bec-7875-52f4-0feb94c33c95