摩訶止觀 9.7

9.7

Next, explaining tainted and untainted: If judged according to the Abhidharma, these ten dhyānas are all called tainted; cultivated by wisdom focused on the truths, they are called untainted dhyāna. Otherwise, cultivated merely with a focus on phenomena, they are called tainted dhyāna. The Tattvasiddhi is also like this: the fundamental and others are tainted; cultivated with an empty and signless mind, they are called untainted.