As The mistake was completed because of the god Indra, he grants Hanuman a would like that his body could be as strong as Indra's Vajra, Which his Vajra can also not damage him. As well as Indra other gods have also granted him wishes: the God Agni granted Hanuman https://pressnewsdigest.blogspot.com/2024/08/the-significance-of-hanuman-jayanti.html