俱舍論記 13.89

13.89

「又契經說至實有無表色」者，此是第八戒為堤塘證。戒為堤塘，明知別有無表為體。由此八證，知實有無表色。此即總結。

"Furthermore, a sūtra says [...] uninformative form really exists": this is the eighth proof from morality serving as an embankment. Morality serves as an embankment; thus we clearly know that there is separately the uninformative as its entity. Due to these eight proofs, we know that uninformative form really exists. This is the general conclusion.