Udāna 3: Nandavaggo
The Chapter (including the Discourse) About Nanda
4: The Discourse about Sāriputta
Thus I heard:
at one time the Fortunate One was dwelling near Sāvatthī, in Jeta’s Wood, at Anāthapiṇḍika’s monastery.
Then at that time venerable Sāriputta was sitting not far away from the Fortunate One, after folding his legs crosswise, and setting his body straight, and was attending to mindfulness at the front.
The Fortunate One saw that venerable Sāriputta was sitting not far away, after folding his legs crosswise, and setting his body straight, and was attending to mindfulness at the front.
Then the Fortunate One, having understood the significance of it, on that occasion uttered this exalted utterance:
“Just like a mountain rock, unagitated, well established,
So is the monk, through the destruction of delusion - like a mountain he does not shake.”