As the error was done by the god Indra, he grants Hanuman a wish that his system might be as solid as Indra's Vajra, Which his Vajra might also not damage him. Along with Indra other gods have also granted him needs: the God Agni granted Hanuman a want that https://hanumanjitemplenearadelaide.blogspot.com/2025/03/shani-dev-temple-sacred-space-for.html