As The error was performed by the god Indra, he grants Hanuman a want that his overall body would be as powerful as Indra's Vajra, and that his Vajra also can not damage him. Along with Indra other gods have also granted him needs: the God Agni granted Hanuman a https://hanumanhindutempleadelaide.blogspot.com/2024/07/the-multifaceted-role-of-hanuman-mandir.html