菩薩從兜術天降神母胎說廣普經 2.21

2.21

"For countless asaṃkhyeya kalpas I have cultivated the mind-consciousness and accomplished the bodhisattva's magical faculties, gathering the mind into meditative concentration to roam through immeasurable Buddha-lands, returning to the original place in the time it takes a strong man to bend or extend his arm. The bodhisattva of mind-consciousness also enters the apparitional birth, womb birth, moisture birth, and egg birth, displaying inconceivable miraculous transformations to instruct and transform, and in that very place accomplishes the unconditioned Path. The bodhisattva of mind-consciousness is the most supreme and excellent among all magical faculties, not something that pratyekabuddhas or arhats can conceive of. Why is that? Because it is not their sphere."