釋禪波羅蜜次第法門 6.8

6.8

二者、外道行人雖得四禪，而見有心識之患，欲求涅槃無想寂滅，不知破色，直用邪智滅心，入無想定。

Second are non-Buddhist practitioners who, although having attained the fourth dhyāna, see the afflictions of consciousness and mental states and wish to seek the thoughtless extinction of nirvāṇa; not knowing how to break through form, they directly employ wrong wisdom to extinguish mind and enter the absorption of non-conception.