Duccaritasutta
Atha kho aññataro bhikkhu yena bhagavā tenupasaṅkami …pe… “sādhu me, bhante, bhagavā saṅkhittena dhammaṁ desetu, yamahaṁ bhagavato dhammaṁ sutvā eko vūpakaṭṭho appamatto ātāpī pahitatto vihareyyan”ti. “Tasmātiha tvaṁ, bhikkhu, ādimeva visodhehi kusalesu dhammesu. Ko cādi kusalānaṁ dhammānaṁ? Idha tvaṁ, bhikkhu, kāyaduccaritaṁ pahāya kāyasucaritaṁ bhāvessasi. Vacīduccaritaṁ pahāya vacīsucaritaṁ bhāvessasi. Manoduccaritaṁ pahāya manosucaritaṁ bhāvessasi. Yato kho tvaṁ, bhikkhu, kāyaduccaritaṁ pahāya kāyasucaritaṁ bhāvessasi, vacīduccaritaṁ pahāya vacīsucaritaṁ bhāvessasi, manoduccaritaṁ pahāya manosucaritaṁ bhāvessasi, tato tvaṁ, bhikkhu, sīlaṁ nissāya sīle patiṭṭhāya cattāro satipaṭṭhāne bhāveyyāsi.
Bad Conduct
Then a mendicant went up to the Buddha … and said: “Sir, may the Buddha please teach me Dhamma in brief. When I’ve heard it, I’ll live alone, withdrawn, diligent, keen, and resolute.” “Well then, mendicant, you should purify the starting point of skillful qualities. What is the beginning of skillful qualities? Give up bad conduct by way of body, speech, and mind and develop good conduct by way of body, speech, and mind. When you’ve done this, you should develop the four kinds of mindfulness meditation, depending on and grounded on ethics.