As the error was accomplished through the god Indra, he grants Hanuman a desire that his physique would be as robust as Indra's Vajra, and that his Vajra might also not hurt him. Together with Indra other gods have also granted him wishes: the God Agni granted Hanuman a desire https://baglamukhi39405.uzblog.net/facts-about-panchmukhi-hanuman-revealed-46648096