As the error was done because of the god Indra, he grants Hanuman a wish that his system will be as strong as Indra's Vajra, and that his Vajra may not damage him. Along with Indra other gods have also granted him wishes: the God Agni granted Hanuman a would https://directoryethics.com/listings13305872/the-smart-trick-of-hanuman-that-no-one-is-discussing