As The mistake was completed because of the god Indra, he grants Hanuman a wish that his entire body could well be as strong as Indra's Vajra, and that his Vajra may also not harm him. In addition to Indra other gods have also granted him wishes: the God Agni https://hanumantempleinadelaide.fitness.blog/2024/05/17/hanuman-mandir-a-spiritual-haven-in-south-australia/