As The mistake was accomplished because of the god Indra, he grants Hanuman a would like that his system would be as powerful as Indra's Vajra, and that his Vajra can also not harm him. In addition to Indra other gods have also granted him wishes: the God Agni granted https://hanumanmandiradelaide.art.blog/2024/11/16/exploring-spirituality-at-hanuman-mandir-and-shani-dev-temples-in-adelaide/