The seventh day of Navratri is dedicated to Goddess Kaalratri who is one of the fiercest forms of Goddess Durga and is believed as the destroyer of all bad spirits, ghosts, and negative energies. Here, Kaal means time and death and Ratri stands for a night. Hence, Kaalratri is the one who removes darkness. She is revered with name Kalratri because she represents herself as death of Kaal appeared like a dark night for demons.
The left two hands of the Goddess hold a thunderbolt and a scimitar and the right two hands are in the mudras of giving and protecting. Saptami Puja of Goddess Kalratri is considered as Maha puja.
Worship the Kalash and the Gods residing in it, afterward seek the blessings of Goddess Kaalratri. Before beginning the puja, take flowers in your hand and chant the mantras while invoking the Goddess.
Karalvandana Dhoran Muktkeshi Chaturbhurjam
Kalraatri Karalinka Divya Vidyutmala Vibhooshitam
Divya Lauhvraj Vamoghordhaw Karambujam
Abhayan Vardan Chaiv Dakshinodhvagh Panirkaam Mam
Mahamegh Prabhan Shayama Taksha Chaiv Gardbharura
Ghordansh Karalasyan Pinonant Payodharaam
Sukh Pprasan Vadna Smeraan Saroruham
Evam Sachiyanantyet Kalraatri Sarvakaam Samriddhidadam.
Hreem Kaalratri Shri Karali Ch Kleem Kalyani Kalavati
Kaalmata Kalidarpdhni Kamdeesh Kupanivta
Kumatighni Kulinartinashini Kul Kamini
Kleem Hreem Shree Mantravarnen Kalakantakghatini
Kripamayi Kripadhara Kripapara Kripagama.