Kāyagatāsatisutta

sn43.1:2.1 So, mendicants, I’ve taught you the unconditioned and the path that leads to the unconditioned.

sn43.1:2.2 Out of sympathy, I’ve done what a teacher should do who wants what’s best for their disciples.

sn43.1:2.3 Here are these roots of trees, and here are these empty huts. Practice absorption, mendicants! Don’t be negligent! Don’t regret it later! This is my instruction to you.”