菩薩從兜術天降神母胎說廣普經 1.87

1.87

「或時菩薩入不用處三昧，觀此三千大千世界眾生之類，青、黃、赤、白有多有少，即自厭患不用久住，即於胎中成無上道。

"At times, the bodhisattva enters the samādhi of the sphere of nothingness and observes the kinds of sentient beings in this trichiliocosm—blue, yellow, red, and white, whether many or few—and immediately feels revulsion toward them, having no wish to abide for long, realizing the unexcelled path right within the womb.