As the mistake was done through the god Indra, he grants Hanuman a want that his entire body could well be as robust as Indra's Vajra, and that his Vajra could also not damage him. Coupled with Indra other gods have also granted him needs: the God Agni granted Hanuman https://shanimandirinaustralia.blogspot.com/2025/01/discovering-spiritual-essence-of.html