As the error performed by god Indra, he grants Hanuman a want that his human body could be as potent as Indra’s Vajra, in which as his Vajra may not damage him. In addition to Indra other gods have also granted him needs: for instance God Agni granted Hanuman https://baglamukhi37260.blogsvila.com/23815346/little-known-facts-about-hanuman