As the mistake was accomplished via the god Indra, he grants Hanuman a wish that his entire body could be as sturdy as Indra's Vajra, Which his Vajra might also not hurt him. Coupled with Indra other gods have also granted him wishes: the God Agni granted Hanuman a wish https://hindutemplesouthaustralia.family.blog/2025/02/17/the-spiritual-essence-of-hanuman-temples-in-south-australia/