菩薩從兜術天降神母胎說廣普經 1.36

1.36

佛告彌勒：「汝在三十三天，與諸天人說空行法，於彼座中有踐跡耶？無踐跡耶？」

The Buddha told Maitreya: "When you were in the Heaven of the Thirty-Three, speaking the Dharma of practicing emptiness with the devas, was there treading of the path among those on their seats, or was there no treading of the path?"