As the error was done through the god Indra, he grants Hanuman a wish that his overall body can be as powerful as Indra's Vajra, and that his Vajra might also not harm him. In addition to Indra other gods have also granted him wishes: the God Agni granted Hanuman https://prprosphere.blogspot.com/2024/08/hanuman-jayanti-2025-at-hanuman-mandir.html