As the error was done through 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 hurt him. In addition to Indra other gods have also granted him wishes: the God Agni granted Hanuman a https://hanumanjimandir.game.blog/2024/08/08/the-construction-of-hanuman-mandir-a-communitys-spiritual-journey/