一切經音義 25.164

25.164

面門所出（如來面門放光召集有緣還從口入既謂還從明知是口也）。

面門所出 ("emanating from the gate of the face": the Tathāgata emits light from the gate of his face to assemble those who have karmic affinity, and it returns by entering his mouth. Since it says "returns by", we clearly know it is the mouth).