As the error was performed because of the god Indra, he grants Hanuman a desire that his overall body could well be as strong as Indra's Vajra, and that his Vajra may not harm him. Coupled with Indra other gods have also granted him wishes: the God Agni granted Hanuman https://brianc023fzr8.bcbloggers.com/36000310/everything-about-hanuman