As the error was carried out with the god Indra, he grants Hanuman a desire that his system would be as robust as Indra's Vajra, and that his Vajra can also not damage him. Along with Indra other gods have also granted him wishes: the God Agni granted Hanuman a https://ontopicdirectory.com/listings13341238/a-simple-key-for-hanuman-unveiled