As the error was carried out from the god Indra, he grants Hanuman a would like that his entire body would be as strong as Indra's Vajra, Which his Vajra may also not harm him. Together with Indra other gods have also granted him wishes: the God Agni granted Hanuman https://pressnewsengage.blogspot.com/2024/08/hanuman-jayanti-2025-at-hanuman-mandir.html