As the error was done through the god Indra, he grants Hanuman a wish that his overall body will be as powerful as Indra's Vajra, and that his Vajra can also not harm him. Coupled with Indra other gods have also granted him wishes: the God Agni granted Hanuman a https://www.diigo.com/item/note/b3og4/t4ag?k=962dd3a80ed9984f23f4d2229b327dae