Durga, also identified as Adi Parashakti, Devī, Shakti, Bhavani, Parvati, Amba and by numerous other names, is a principal and popular form of Hindu goddess. She is the warrior goddess, whose mythology centers around combating evils and demonic forces that threaten peace, prosperity and dharma of the good. She is the fierce form of the protective mother goddess, willing to unleash her anger against wrong, violence for liberation and destruction to empower creation.Durga is depicted in the Hindu pantheon as a goddess riding a lion or tiger, with many arms each carrying a weapon, often defeating Mahishasura (lit. buffalo demon). She appears in Indian texts as the wife of god Shiva, as another form of Parvati or mother goddess.She is a central deity in Shaktism tradition of Hinduism, where she is equated with the concept of ultimate reality called Brahman. One of the most important texts of Shaktism is Devi Mahatmya, also called as Durgā Saptashatī, which celebrates Durga as the Goddess, declaring her as the Supreme Being and the creator of the universe. Estimated to have been composed between 400 and 600 CE, this text is considered by Shakta Hindus to be as important scripture as the Bhagavad Gita. She has a significant following all over India, Bangladesh and Nepal, particularly in its eastern states such as West Bengal, Odisha, Jharkhand, Assam and Bihar. Durga is revered after spring and autumn harvests, specially during the festival of Navratri.