Maa Siddhidatri
Maa Siddhidatri is the ninth of the nine forms of Durga (Navdurga), worshipped on day 9 of Navratri, the Shukla Navami tithi. The Devi Kavach names her ninth in its list of the nine forms.

Maa Siddhidatri Mahatmya
It is believed that at the beginning of creation Lord Rudra worshipped the formless Adi-Parashakti to bring the world into being. She then appeared as Siddhidatri from the left half of Lord Shiva, which is how Shiva came to be called Ardhanarishvara.
She is seated on a lotus and rides a lion. Her right hands hold a mace and a chakra, her left a lotus and a conch. Not only humans but devas, gandharvas, yakshas, siddhas and even asuras worship her, as her prayer itself says.
Worship of Maa Siddhidatri is believed to bless the devotee with the attainment of siddhis and complete knowledge, and to ease troubles linked to Ketu. Her customary bhog is sesame seeds.
Maa Siddhidatri: Mantra, Prayer and Stuti
Mantra
реР рджреЗрд╡реА рд╕рд┐рджреНрдзрд┐рджрд╛рддреНрд░реНрдпреИ рдирдордГрее
oс╣Г dev─л siddhid─Бtryai namaс╕е||
Prarthana (Dhyana)
рд╕рд┐рджреНрдз рдЧрдиреНрдзрд░реНрд╡ рдпрдХреНрд╖рд╛рджреНрдпреИрд░рд╕реБрд░реИрд░рдорд░реИрд░рдкрд┐редрд╕реЗрд╡реНрдпрдорд╛рдирд╛ рд╕рджрд╛ рднреВрдпрд╛рддреН рд╕рд┐рджреНрдзрд┐рджрд╛ рд╕рд┐рджреНрдзрд┐рджрд╛рдпрд┐рдиреАрее
siddha gandharva yakс╣г─Бdyairasurairamarairapi|sevyam─Бn─Б sad─Б bh┼лy─Бt siddhid─Б siddhid─Бyin─л||
Stuti
рдпрд╛ рджреЗрд╡реА рд╕рд░реНрд╡рднреВрддреЗрд╖реБ рдорд╛рдБ рд╕рд┐рджреНрдзрд┐рджрд╛рддреНрд░реА рд░реВрдкреЗрдг рд╕рдВрд╕реНрдерд┐рддрд╛редрдирдорд╕реНрддрд╕реНрдпреИ рдирдорд╕реНрддрд╕реНрдпреИ рдирдорд╕реНрддрд╕реНрдпреИ рдирдореЛ рдирдордГрее
y─Б dev─л sarvabh┼лteс╣гu m─Бm╠Р siddhid─Бtr─л r┼лpeс╣Зa saс╣Гsthit─Б|namastasyai namastasyai namastasyai namo namaс╕е||
Navdurga in the Devi Kavach (verses 3-5) тЖТ
рдкреНрд░рдердордВ рд╢реИрд▓рдкреБрддреНрд░реА рдЪ рджреНрд╡рд┐рддреАрдпрдВ рдмреНрд░рд╣реНрдордЪрд╛рд░рд┐рдгреАредрддреГрддреАрдпрдВ рдЪрдиреНрджреНрд░рдШрдгреНрдЯреЗрддрд┐ рдХреВрд╖реНрдорд╛рдгреНрдбреЗрддрд┐ рдЪрддреБрд░реНрдердХрдореНреердкрдЮреНрдЪрдордВ рд╕реНрдХрдиреНрджрдорд╛рддреЗрддрд┐ рд╖рд╖реНрдардВ рдХрд╛рддреНрдпрд╛рдпрдиреАрддрд┐ рдЪредрд╕рдкреНрддрдордВ рдХрд╛рд▓рд░рд╛рддреНрд░реАрддрд┐ рдорд╣рд╛рдЧреМрд░реАрддрд┐ рдЪрд╛рд╖реНрдЯрдордореНреердирд╡рдордВ рд╕рд┐рджреНрдзрд┐рджрд╛рддреНрд░реА рдЪ рдирд╡рджреБрд░реНрдЧрд╛рдГ рдкреНрд░рдХреАрд░реНрддрд┐рддрд╛рдГред
prathamaс╣Г ┼Ыailaputr─л ca dvit─лyaс╣Г brahmac─Бriс╣З─л|tс╣Ыt─лyaс╣Г candraghaс╣Зс╣нeti k┼лс╣гm─Бс╣Зс╕Нeti caturthakam||pa├▒camaс╣Г skandam─Бteti с╣гaс╣гс╣нhaс╣Г k─Бty─Бyan─лti ca|saptamaс╣Г k─Бlar─Бtr─лti mah─Бgaur─лti c─Бс╣гс╣нamam||navamaс╣Г siddhid─Бtr─л ca navadurg─Бс╕е prak─лrtit─Бс╕е|
Readings Related to Maa Siddhidatri
Durga Saptashati
Festivals & Vrats
Chalisa, Aarti & Katha
About Maa Siddhidatri
On day 9 of Navratri, after the morning bath, meditate on Maa Siddhidatri before the kalash with the prayer above, chant her mantra and offer the bhog. The Durga Saptashati's seven-day reading order is completed on Saptami, so no chapter is assigned to this day.
Frequently Asked Questions
On which day is Maa Siddhidatri worshipped?
On day 9 of Navratri, the Shukla Navami tithi, in both Chaitra and Ashwin (Shardiya) Navratri.
What is the mantra of Maa Siddhidatri?
Her mantra is "Om Devi Siddhidatryai Namah", recited along with the stuti 'Ya Devi Sarvabhuteshu Maa Siddhidatri Rupena Samsthita'.
What is Maa Siddhidatri's mount and form?
Mount: Lion; she is seated on a lotus. Form: Four hands, a mace and a chakra on the right, a lotus and a conch on the left.
Which Durga Saptashati chapters are read on day 9 of Navratri?
The Durga Saptashati's seven-day reading order is completed on Saptami, so no chapter is assigned to this day.