[122] Then, not long after Pukkusa the Mallaputta had departed, the Venerable Ānanda brought that pair of burnished cloth-of-gold robes, fit to be worn, up close to the body of the Blessed One. When placed against the body of the Blessed One, that cloth appeared as though its glow were extinguished (hatacchikaṃ viya). Then the Venerable Ānanda said to the Blessed One: "It is wonderful, venerable sir, it is marvellous, venerable sir, how exceedingly pure and radiant is the color of the Tathāgata's skin! Venerable sir, this pair of burnished cloth-of-gold robes, fit to be worn, when brought up close to the body of the Blessed One, appears as though its glow were extinguished."
"So it is, Ānanda. On two occasions, Ānanda, the body of the Tathāgata becomes exceedingly pure, the color of the skin radiant. On which two? On the night, Ānanda, when the Tathāgata awakens to the unsurpassed perfect enlightenment, and on the night when he attains final Nibbāna (parinibbāna) in the Nibbāna-element without residue remaining — on these two occasions, Ānanda, the body of the Tathāgata becomes exceedingly pure, the color of the skin radiant. And today, Ānanda, in the last watch of the night, in the sāla grove of the Mallas at Upavattana near Kusinārā, between the twin sāla trees, the final Nibbāna of the Tathāgata will take place. Come, Ānanda, let us go to the river Kakudhā."
"Yes, venerable sir," the Venerable Ānanda replied to the Blessed One.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.