According to Hindu Mythology, Goddess Parvati survived only on Bilva leaves and later she even stopped that hence, she was bestowed with name Goddess Brahmacharini.
Goddess Brahmacharini is represented walking bare feet, with just two hand, in one she carries a Jap Mala, and a Kamandal in another hand.
Goddess Brahmacharani is offered prayers on 2nd Day of Navratri.