Hanuman was a person of these 4 monkeys. This monkey group was instrumental in offering Rama key specifics of Sita. They assisted him develop a bridge through the seas, and cross above which has a monkey army that efficiently stormed the demon stronghold and freed Sita. भस्मसादभवदैत्यो दुष्टचेष्टितमन्तकृत् ॥ २३ https://www.instagram.com/tantramantraaurvigyaan/