As the mistake was carried out by the god Indra, he grants Hanuman a would like that his overall body can be as sturdy as Indra's Vajra, Which his Vajra also can not hurt him. Together with Indra other gods have also granted him wishes: the God Agni granted Hanuman https://hanumanmandirinadelaide.blogspot.com/2024/07/experience-serenity-at-hanuman-mandir.html