Ud 8.2
PTS: Ud 80
Nibbāna Sutta: Parinibbana (2)
translated from the Pali by
John D. Ireland
Alternate translation: Thanissaro

Thus have I heard. At one time the Lord was staying near Savatthi in the Jeta Wood at Anathapindika's monastery. On that occasion the Lord was instructing... the bhikkhus with a Dhamma talk connected with Nibbana, and those bhikkhus... were intent on listening to Dhamma.

Then, on realizing its significance, the Lord uttered on that occasion this inspired utterance:

The uninclined is hard to see, The truth is not easy to see; Craving is penetrated by one who knows, For one who sees there is nothing.

See also: Ud 8.1; Ud 8.3; Ud 8.4.