[221] Then the Blessed One addressed the bhikkhus: "Come, bhikkhus, let us go to the Black Rock (Kāḷasilā) on the slope of Isigili, where the clansman (kulaputta) Vakkali has used the knife." "Yes, venerable sir," those bhikkhus replied to the Blessed One. Then the Blessed One, together with a number of bhikkhus, went to the Black Rock on the slope of Isigili. The Blessed One saw, even from a distance, the Venerable Vakkali lying on the couch with his shoulders turned. Now on that occasion a smokiness, a darkness, was moving to the eastern quarter, moving to the western quarter, moving to the northern quarter, moving to the southern quarter, moving to the quarter above, moving to the quarter below, moving to the intermediate quarters. Then the Blessed One addressed the bhikkhus: "Bhikkhus, do you see that smokiness, that darkness, moving to the eastern quarter … moving to the intermediate quarters?" "Yes, venerable sir." "That, bhikkhus, is Māra the Evil One, searching for the consciousness of the clansman Vakkali, thinking: 'Where has the consciousness of the clansman Vakkali become established?' But, bhikkhus, with consciousness unestablished, the clansman Vakkali has attained final Nibbāna (parinibbuta)."
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.