Mantra
ॐ दुं दुर्गायै नमः
Om Dum Durgayei Namah
Meaning
Salutations to Durga — the invincible mother, destroyer of evil and protector of the devotee.
Significance
Dum is the bija of Goddess Durga, encoding her protective power. This mantra creates a protective shield (Kavach) around the devotee, removes fear, and helps overcome internal and external enemies. Especially potent during Navratri.