[1662] "Bhikkhus, do not engage in contentious talk (viggāhikakathā), such as: 'You do not understand this Dhamma and Discipline; I understand this Dhamma and Discipline. How could you understand this Dhamma and Discipline? You are practising wrongly; I am practising rightly. What should have been said first you said last; what should have been said last you said first. My statement is coherent; yours is incoherent. What you have long practised has been overturned. Your assertion has been shown up for the sake of releasing the counter-assertion; you are refuted — extricate yourself if you can.' For what reason? Because, bhikkhus, this talk is unbeneficial, does not belong to the fundamentals of the holy life, and does not lead to disenchantment, to dispassion, to cessation (nirodha), to peace, to direct knowledge, to full awakening, or to Nibbāna. But when you speak, bhikkhus, you should speak thus: 'This is suffering (dukkha)'; you should speak thus: 'This is the origin of suffering'; you should speak thus: 'This is the cessation of suffering'; you should speak thus: 'This is the way of practice leading to the cessation of suffering.' … 'an exertion should be made.'"
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.