As The error was done from the god Indra, he grants Hanuman a wish that his entire body can be as solid as Indra's Vajra, Which his Vajra may also not harm him. As well as Indra other gods have also granted him wishes: the God Agni granted Hanuman a https://panchmukhihanumaninsydney.blogspot.com/2025/01/the-significance-of-hanuman-mandirs.html