Region : Tamil Nadu, Kerala, Karnataka & Andhra Pradesh.
The ninth day is also the day of the Ayudha Puja. After the slaying of Mahishasura and other demons by Chamundeswari, there was no more use for her weapons. So the weapons were kept aside and worshipped. This Ayudha puja is being celebrated since ancient times. The importance of Ayudha Puja on this occasion may also be due to the fact that on the Vijayadasami day, Arjuna took back his weapons which he had hidden in a Vani tree in order to lead a life in disguise for the promised period of exile. It is believed that one who begins or renovates his learning to work on the Vijayadasami day will secure a grand success as Arjuna did in Kurukshetra war.
The Ayudha Puja is a worship of whatever implements one may use in one's livelihood. On the preceding evening, it is traditional to place these implements on an altar to the Divine. If one can make a conscious effort to see the divine in the tools and objects one uses each day, it will help one to see one's work as an offering to God. It will also help one to maintain constant remembrance of the divine. In India it is customary for one to prostrate before the tools one will use before starting one's work each day; this is an expression of gratitude to God for helping one to fulfil one's duties.