Hanuman was just one of such four monkeys. This monkey group was instrumental in supplying Rama key details about Sita. They helped him make a bridge over the seas, and cross around which has a monkey army that productively stormed the demon stronghold and freed Sita. The beej mantra “LAM” https://free-kundli78012.ttblogs.com/17362508/the-fact-about-mohini-that-no-one-is-suggesting