As the error was completed through the god Indra, he grants Hanuman a want that his physique might be as powerful as Indra's Vajra, Which his Vajra can also not harm him. Along with Indra other gods have also granted him needs: the God Agni granted Hanuman a want that https://shanidevmandirnearme.blogspot.com/2024/06/discover-hanuman-mandir-spiritual-oasis.html