As the mistake was completed because of the god Indra, he grants Hanuman a wish that his entire body can be as potent as Indra's Vajra, Which his Vajra might also not hurt him. Along with Indra other gods have also granted him wishes: the God Agni granted Hanuman a https://www.evernote.com/shard/s426/sh/486baef3-58e4-2f84-289f-380b239654c8/fyRnOXzxXxlwww9YpQi2bvYlKjaoFNNPiBoblftT6y3aRFl4UkCRYaMTqg