Siddhidatri is the ninth form of the Goddess Durga, the meaning of her name is Siddhi means supernatural power, and Dhatri means giver or awarder. She is worshipped on the ninth day of Navaratri, she fulfills all the devotees wishes and giver of all forms of achievements [Siddhi].
In this form Durga is seated on a lotus and is four-armed. She holds a lotus, mace, Sudarshana Chakra and shankha. In this form Durga removes ignorance and she provides the knowledge to realize. She is surrounded by Siddhas, Gandharvas, Yakshas, Asura (Demons) and Devata(Gods) who are worshipping her. The Siddhi that she provides is the realization that only she exists. She is the mistress of all achievements and perfections.
Story:
Supreme God Shiva got all these ‘siddhis’ by worshiping Maha Shakti. With her gratitude the half body of Shiva became that of the Goddess Shakti and therefore he also came to be called as ‘Ardhanarishvar’.
Siddhidatri has four hands holding a discus, conch shell, trident and mace, sitting on a fully bloomed lotus or a lion. She is served among the eight supernatural powers or the siddhis named Anima, Mahima, Garima, Laghima, Prapti, Prakambya, Ishitva and Vashitva. Anima means to reduce one's body even the size of an atom; Mahima means to expand one's body to an infinitely large size; Garima means almost becoming infinitely heavy; Laghima means becoming almost weightless; Prapti means having unrestricted access to all places; Prakambya means to realize whatever one desire; Ishitva means to possess absolute lordship and Vashitva is the power to subjugate all.
Mantra -
ॐ देवी सिद्धिदात्र्यै नमः॥
Om Devi Siddhidatryai Namah॥
Prarthana -
सिद्ध गन्धर्व यक्षाद्यैरसुरैरमरैरपि।
सेव्यमाना सदा भूयात् सिद्धिदा सिद्धिदायिनी॥
Siddha Gandharva Yakshadyairasurairamarairapi।
Sevyamana Sada Bhuyat Siddhida Siddhidayini॥
Stuti -
या देवी सर्वभूतेषु माँ सिद्धिदात्री रूपेण संस्थिता। नमस्तस्यै नमस्तस्यै नमस्तस्यै नमो नमः॥
Ya Devi Sarvabhuteshu Maa Siddhidatri Rupena Samsthita।
Namastasyai Namastasyai Namastasyai Namo Namah॥
Dhyana -
वन्दे वाञ्छित मनोरथार्थ चन्द्रार्धकृतशेखराम्।
कमलस्थिताम् चतुर्भुजा सिद्धीदात्री यशस्विनीम्॥
स्वर्णवर्णा निर्वाणचक्र स्थिताम् नवम् दुर्गा त्रिनेत्राम्।
शङ्ख, चक्र, गदा, पद्मधरां सिद्धीदात्री भजेम्॥
पटाम्बर परिधानां मृदुहास्या नानालङ्कार भूषिताम्।
मञ्जीर, हार, केयूर, किङ्किणि रत्नकुण्डल मण्डिताम्॥
प्रफुल्ल वन्दना पल्लवाधरां कान्त कपोला पीन पयोधराम्।
कमनीयां लावण्यां श्रीणकटिं निम्ननाभि नितम्बनीम्॥
Vande Vanchhita Manorathartha Chandrardhakritashekharam।
Kamalasthitam Chaturbhuja Siddhidatri Yashasvinim॥
Swarnavarnna Nirvanachakra Sthitam Navam Durga Trinetram।
Shankha, Chakra, Gada, Padmadharam Siddhidatri Bhajem॥
Patambara Paridhanam Mriduhasya Nanalankara Bhushitam।
Manjira, Hara, Keyura, Kinkini, Ratnakundala Manditam॥
Praphulla Vandana Pallavadharam Kanta Kapolam Pin Payodharam।
Kamaniyam Lavanyam Shrinakati Nimnanabhi Nitambanim॥
Stotra -
कञ्चनाभा शङ्खचक्रगदापद्मधरा मुकुटोज्वलो।
स्मेरमुखी शिवपत्नी सिद्धिदात्री नमोऽस्तुते॥
पटाम्बर परिधानां नानालङ्कार भूषिताम्।
नलिस्थिताम् नलनार्क्षी सिद्धीदात्री नमोऽस्तुते॥
परमानन्दमयी देवी परब्रह्म परमात्मा।
परमशक्ति, परमभक्ति, सिद्धिदात्री नमोऽस्तुते॥
विश्वकर्ती, विश्वभर्ती, विश्वहर्ती, विश्वप्रीता।
विश्व वार्चिता, विश्वातीता सिद्धिदात्री नमोऽस्तुते॥
भुक्तिमुक्तिकारिणी भक्तकष्टनिवारिणी।
भवसागर तारिणी सिद्धिदात्री नमोऽस्तुते॥
धर्मार्थकाम प्रदायिनी महामोह विनाशिनीं।
मोक्षदायिनी सिद्धीदायिनी सिद्धिदात्री नमोऽस्तुते॥
Kanchanabha Shankhachakragadapadmadhara Mukatojvalo।
Smeramukhi Shivapatni Siddhidatri Namoastute॥
Patambara Paridhanam Nanalankara Bhushitam।
Nalisthitam Nalanarkshi Siddhidatri Namoastute॥
Paramanandamayi Devi Parabrahma Paramatma।
Paramashakti, Paramabhakti, Siddhidatri Namoastute॥
Vishvakarti, Vishvabharti, Vishvaharti, Vishvaprita।
Vishva Varchita, Vishvatita Siddhidatri Namoastute॥
Bhuktimuktikarini Bhaktakashtanivarini।
Bhavasagara Tarini Siddhidatri Namoastute॥
Dharmarthakama Pradayini Mahamoha Vinashinim।
Mokshadayini Siddhidayini Siddhidatri Namoastute॥
Kavacha -
ॐकारः पातु शीर्षो माँ, ऐं बीजम् माँ हृदयो।
हीं बीजम् सदापातु नभो गृहो च पादयो॥
ललाट कर्णो श्रीं बीजम् पातु क्लीं बीजम् माँ नेत्रम् घ्राणो।
कपोल चिबुको हसौ पातु जगत्प्रसूत्यै माँ सर्ववदनो॥
Omkarah Patu Shirsho Maa, Aim Bijam Maa Hridayo।
Him Bijam Sadapatu Nabho Griho Cha Padayo॥
Lalata Karno Shrim Bijam Patu Klim Bijam Maa Netram Ghrano।
Kapola Chibuko Hasau Patu Jagatprasutyai Maa Sarvavadano॥
Benefits:
Bhagavan Shiva had attained all the achievements only by the grace of Maa Siddhidaatri. Worshiping Maa Siddhidatri on the ninth day of navratri one can obtain all this achievements [Siddhi].she fulfills all the devotees wishes.