As the error was performed from the god Indra, he grants Hanuman a desire that his overall body could well be as powerful as Indra's Vajra, and that his Vajra may not harm him. In addition to Indra other gods have also granted him wishes: the God Agni granted Hanuman https://indiantempleadelaide.home.blog/2024/06/14/embrace-serenity-and-culture-at-the-hanuman-mandir/