As the mistake was carried out from the god Indra, he grants Hanuman a desire that his physique will be as sturdy as Indra's Vajra, and that his Vajra might also not hurt him. As well as Indra other gods have also granted him needs: the God Agni granted Hanuman https://hindutemplesouthaustralia.car.blog/2024/02/22/spiritual-journey-puja-at-hanuman-ji-mandir-south-australia/