Saṁvarasutta
“Saṁvarañca vo, bhikkhave, desessāmi, asaṁvarañca. Taṁ suṇātha. Kathañca, bhikkhave, asaṁvaro hoti? Santi, bhikkhave, cakkhuviññeyyā rūpā iṭṭhā kantā manāpā piyarūpā kāmūpasaṁhitā rajanīyā. Tañce bhikkhu abhinandati abhivadati ajjhosāya tiṭṭhati, veditabbametaṁ, bhikkhave, bhikkhunā: ‘parihāyāmi kusalehi dhammehi. Parihānañhetaṁ vuttaṁ bhagavatā’ti …pe… santi, bhikkhave, jivhāviññeyyā rasā …pe… santi, bhikkhave, manoviññeyyā dhammā iṭṭhā kantā manāpā piyarūpā kāmūpasaṁhitā rajanīyā. Tañce bhikkhu abhinandati abhivadati ajjhosāya tiṭṭhati, veditabbametaṁ, bhikkhave, bhikkhunā: ‘parihāyāmi kusalehi dhammehi. Parihānañhetaṁ vuttaṁ bhagavatā’ti. Evaṁ kho, bhikkhave, asaṁvaro hoti.
Restraint
“Mendicants, I will teach you who is restrained and who is unrestrained. Listen … And how is someone unrestrained? There are sights known by the eye, which are likable, desirable, agreeable, pleasant, sensual, and arousing. If a mendicant approves, welcomes, and keeps clinging to them, they should understand: ‘My skillful qualities are declining. For this is what the Buddha calls decline.’ There are sounds … smells … tastes … touches … ideas known by the mind, which are likable, desirable, agreeable, pleasant, sensual, and arousing. If a mendicant approves, welcomes, and keeps clinging to them, they should understand: ‘My skillful qualities are declining. For this is what the Buddha calls decline.’ This is how someone is unrestrained.