The Cundi Mantra
Cundi Bodhisattva also called the Seven Koti Mother Buddha, which means that She is the Mother of Seven Billion Buddhas and Bodhisattvas.
In the sutra, the Buddha speaks extensively about the various effects and benefits of reciting the Cundi Mantra. Many of the effects are purifying and uplifting in nature. The most notable one is to purify bad karma which hinders one from developing samadhi and to facilitate advancement on the path to enlightenment.

