Hanuman was just one of such 4 monkeys. This monkey team was instrumental in offering Rama critical details about Sita. They served him make a bridge across the seas, and cross about having a monkey Military that productively stormed the demon stronghold and freed Sita. Lord Śiva mentioned to him: https://vashikaran96395.blogprodesign.com/58727356/the-basic-principles-of-mantra