So, Ānanda, I’ve taught you directed development and undirected development. Out of sympathy, I’ve done what a teacher should do who wants what’s best for their disciples. Here are these roots of trees, and here are these empty huts. Practice absorption, Ānanda! Don’t be negligent! Don’t regret it later! This is my instruction to you.”

That is what the Buddha said. Satisfied, Venerable Ānanda approved what the Buddha said.

Linked Discourses 47.11 2. At Nāḷandā A Great Man