Avalokitesvara Bodhisattva then said to the Buddha: "Bhagavan, I
remember that countless billions of kalpas ago, a Buddha, whose
name was Thousand Rays King Stillness Thus Come One, appeared in
the world. Because of his mercy and mindfulness to me and all
living beings, that Buddha, the World Honored One spoke this Vast,
Perfect, Unimpeded, Great Compassionate Heart Dharani, rubbed my
crown with his golden hand and said: 'Virtuous man, you should hold
this heart-mantra to give great benefit and happiness to all living
beings in the future evil age.' At that time I was just at
the first Bhumi(stage of Bodhisattva), right after hearing this
mantra, I exceeded the eighth Bhumi.
http://www.e-sangha.com/alphone/dabei_sutra.htm