As The error was finished because of the god Indra, he grants Hanuman a want that his physique would be as sturdy as Indra's Vajra, and that his Vajra may not damage him. Coupled with Indra other gods have also granted him needs: the God Agni granted Hanuman a desire https://share.evernote.com/note/9f1ba5dc-5509-8c3d-485a-6916a1dedf05