[328] Then, not long after the Sakyans of Kapilavatthu had departed, the Blessed One addressed the Venerable Mahāmoggallāna: "Moggallāna, the Saṅgha of bhikkhus is free of dullness and drowsiness. Let a Dhamma talk to the bhikkhus occur to you, Moggallāna. My back is aching; I shall stretch it." "Yes, venerable sir," the Venerable Mahāmoggallāna replied to the Blessed One. Then the Blessed One, having spread out his outer robe (saṅghāṭi) folded in four, lay down in the lion's posture on his right side, placing one foot upon the other, with mindfulness and clear comprehension, having attended to the perception of rising.
There the Venerable Mahāmoggallāna addressed the bhikkhus: "Friends, bhikkhus!" "Friend," those bhikkhus replied to the Venerable Mahāmoggallāna. The Venerable Mahāmoggallāna said this: "Friends, I shall teach you the exposition on the corrupted (avassuta) and the exposition on the uncorrupted (anavassuta). Listen to it and attend closely; I shall speak." "Yes, friend," those bhikkhus replied to the Venerable Mahāmoggallāna. The Venerable Mahāmoggallāna said this: "How, friends, is one corrupted? Here, friends, a bhikkhu, having seen a form with the eye, is intent upon a pleasing form and is repelled by a displeasing form; he dwells without mindfulness of the body established, with a limited mind (citta), and he does not understand as it really is that liberation of mind (cetovimutti) and liberation by wisdom (paññāvimutti) wherein those arisen evil, unwholesome dhammas cease without remainder. … Having tasted a flavour with the tongue … Having cognized a mental phenomenon (dhamma) with the mind, he is intent upon a pleasing mental phenomenon and is repelled by a displeasing mental phenomenon; he dwells without mindfulness of the body established, with a limited mind, and he does not understand as it really is that liberation of mind and liberation by wisdom wherein those arisen evil, unwholesome dhammas cease without remainder. This, friends, is called a bhikkhu who is corrupted regarding forms cognizable by the eye … corrupted regarding flavours cognizable by the tongue … corrupted regarding mental phenomena cognizable by the mind."
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.