As the error was carried out by the god Indra, he grants Hanuman a want that his entire body would be as sturdy as Indra's Vajra, and that his Vajra can also not hurt him. As well as Indra other gods have also granted him wishes: the God Agni granted https://pressnewsfeed.blogspot.com/2024/08/the-significance-of-hanuman-jayanti.html