As the error was done with the god Indra, he grants Hanuman a want that his physique could be as strong as Indra's Vajra, and that his Vajra could also not harm him. In conjunction with Indra other gods have also granted him needs: the God Agni granted Hanuman a https://shanidevmandirinadelaide.blogspot.com/2024/08/the-significance-of-hanuman-jayanti.html