撫州曹山本寂禪師語錄 2.33

2.33

夫沙門取食，有三等墮：作水牯牛是沙門墮，不受食是尊貴墮，不斷聲色是隨類墮。只墮去是甚麼人分上事（欲知則是入異類中，不認沙門邊事。所以古人權借水牯牛為異類，祇是事上異類，非言語中異類）。

When a śramaṇa takes food, there are three kinds of falls: acting as a water buffalo is the śramaṇa's fall; not accepting food is the fall of the noble; not severing sound and form is the fall of following kinds. As for just falling, whose sphere is it? (If you wish to know, it is entering among different kinds, not acknowledging matters on the śramaṇa's side. Therefore, the ancients temporarily borrowed the water buffalo as a different kind; it is merely a different kind in terms of phenomena, not a different kind in words.)