俱舍論記 24.77

24.77

「以心無故依身生故」者，答。入滅盡定，以心無故、依身生故，名身證。後出定已猶名得彼，得依身生故，亦名為身證。

"Because of the absence of mind and because it arises supported by the body": this answers. Entering the absorption of cessation, because mind is absent and because it arises supported by the body, one is called a bodily witness. Later, having emerged from the absorption, one is still called an attainer of it; because the possession arises supported by the body, one is also called a bodily witness.