Shiva Purana (Rudraksha Mahatmya):
नवमुखं च महादेव्याः स्वरूपं शत्रुनाशनम्।
भयत्रासनशं शुद्धं सर्वसिद्धिप्रदायकम्॥
Meaning:
The 9 Mukhi Rudraksha is a form of Goddess Durga, who destroys enemies, dispels fear, and bestows all Siddhis.
9 Mukhi Rudraksha is considered to be the form of Goddess Durga (Navdurga). This Rudraksha is a symbol of nine powers (Navshaktis) and destroys all types of fears, enemies, planetary obstacles, and mental weaknesses. It is also effective in removing the defects of Rahu planet.