菩薩瓔珞本業經 2.28

2.28

「佛子！以正無相善入眾生空，現萬佛世界，六通變化空同無為故，名離垢地。

"O Son of the Buddha! By correctly entering into the emptiness of sentient beings through signlessness, manifesting myriad Buddha worlds, and with the transformations of the six superknowledges being empty and identical to the unconditioned, it is called the Vimalā-bhūmi.