As the mistake was performed via the god Indra, he grants Hanuman a would like that his body might be as strong as Indra's Vajra, and that his Vajra can also not hurt him. In conjunction with Indra other gods have also granted him needs: the God Agni granted Hanuman https://www.tumblr.com/hindutempleadelaide/757260110488846336/experience-serenity-at-hanuman-mandir-adelaide?source=share