菩薩瓔珞本業經 1.65

1.65

"Buddha-son! As for retrogression and advancement: prior to the ten abodes, among all the practices of ordinary people, when they generate the mind of sambodhi, there are sentient beings as numerous as the sands of the Ganges who learn and practice the Buddha-Dharma within minds of faith and conception—these belong to the wholesome roots subject to retrogression. Good sons! If one cultivates the ten faiths for one kalpa, two kalpas, or even ten kalpas, and manages to enter the ten abodes, at that time, from the initial first abode up to the sixth abode, if one cultivates the correct contemplation of the sixth prajñāpāramitā so that it manifests before oneself, and furthermore encounters the protection of buddhas, bodhisattvas, and spiritual friends, one will emerge into the seventh abode and constantly abide without retrogression. Prior to this seventh abode, it is called the stage subject to retrogression."