Then, not long after he had left, the Buddha addressed the mendicants: “Suppose there was a bungalow or a hall with a peaked roof, with windows on the eastern side. When the sun rises and a ray of light enters through a window, where would it land?” “On the western wall, sir.” “In the same way, the brahmin Uṇṇābha’s faith in the Realized One is settled, rooted, and planted deep. It’s strong and can’t be shifted by any ascetic or brahmin or god or Māra or divinity or by anyone in the world. If he were to pass away at this time, he would be bound by no fetter that might return him to this world.”

Linked Discourses 48.43 5. Old Age At Sāketa

So I have heard. At one time the Buddha was staying near Sāketa in the deer park at the Añjana Wood. There the Buddha addressed the mendicants: “Mendicants, is there a method in which the five faculties become the five powers, and the five powers become the five faculties?”

“Our teachings are rooted in the Buddha. He is our guide and our refuge. Sir, may the Buddha himself please clarify the meaning of this. The mendicants will listen and remember it.”

“Mendicants, there is a method in which the five faculties become the five powers, and the five powers become the five faculties.