The Shrimad-devi Bhagwat and Shri Durgasaptshati mentions the significance of puja done during the Navratri. Devi Mahaatmya and other texts invoking Goddess Durga are cited during thir period of nine days.
A Rudraksha rosary is most commonly prepared from five faced beads that are available most abundantly and also in various sizes . In Devi Bhagwat Puran one can read about method of preparation of Rudraksha mala for counting beads while chanting mantras. The main mouth (whole side) part of a Rudraksha is called Brahma, the middle part Rudra (Shiva) and the hind part Vishnu. Thus the Trinity form of Lord Rudra gives the worldly pleasures and salvation to man in this world.
In Devi Bhagwat Puran one can read about method of preparation of Rudraksha mala for counting beads while chanting mantras