The Sharanagata mantra is a mantra from the Devi Mahatmyam, from the Narayani Stotra. We have a lot of workshops on mantra chanting and music by Yoga Vidya. It is a mantra for protection. The Divine Mother is invoked for protection and assistance.
Here is the text:
Om Sharanāgata Dinārta
Sarvasyārti Hare Devi
Nārāyani Namostu Te
Reverence of Goddess Narayani. She saves the desperate and needy persons who seek refuge in her. Greetings to the Devi, which eliminates all the sufferings of her admirers.