As the mistake was completed through the god Indra, he grants Hanuman a want that his entire body will be as strong as Indra's Vajra, and that his Vajra could also not hurt him. In addition to Indra other gods have also granted him needs: the God Agni granted Hanuman https://jaidenwsjzr.blogoxo.com/37258969/little-known-facts-about-hanuman