As the mistake was performed by the god Indra, he grants Hanuman a wish that his entire body might be as potent as Indra's Vajra, Which his Vajra may not hurt him. In addition to Indra other gods have also granted him wishes: the God Agni granted Hanuman a wish https://shanimandiradelaide.blogspot.com/2024/07/a-deeper-dive-into-hanuman-mandir.html