Matangi is the aspect of Devi (in other words, the Mahavidya) who is the patron of inner thought. She guides her devotee to the uncaused primordial sound. Matangi has a dark emerald complexion and has three eyes.
It is said that once Vishnu and Lakshmi went to visit Shiva and Parvati. Vishnu and Lakshmi gave Shiva and Parvati fine foods, and some pieces dropped to the ground. From these remains arose a maiden endowed with fair qualities. She asked for leftover food (uccishtha). The four deities offered her their leftovers as prasada (food made sacred by having been tasted by deities). Shiva then said to the attractive maiden: "Those who repeat your mantra and worship you, their activities will be fruitful. They will be able to control their enemies and obtain the objects of their desires." From then on this maiden became known as Uccishtha-matangini. She is the bestower of all boons.