Once Sage Narada came to visit his father who is Brahma. Brahma was worried that man was falling prey to his animal instincts during Kaliyuga.
Nava-Durga
Navadurga, which literally means the nine forms of Goddess Durga, constitute, according to vedic scriptures, the manifestation of Durgā in Her nine different aspects. These nine forms of manifestation are Śhailaputrī, Brahmachāriṇī, Chandrakaṇṭā, Kuṣhmāṇḍā, Skandamātā, Kātyāyanī, Kālarātrī, Mahāgaurī and Siddhidātrī – together worshipped during the Navrātri