六妙法門 1.59

1.59

復次，行者當觀心時，知心性常寂，即諸法亦寂，寂故不念，不念故即不動，不動故名止也。當知心者，即是止門。

Furthermore, when the practitioner contemplates the mind, they know that the nature of the mind is constantly quiescent, and thus all dharmas are also quiescent; being quiescent, they do not think; not thinking, they do not move; not moving, it is called cessation. Know that the mind is itself the gate of cessation.