1. Kathā Sutta.– On the five qualities that help a monk who practises mindfulness of respiration (ānāpānasati) to attain to the immovable state (akuppaṃ). These qualities include conversation that expands the mind. A.iii.120 f.
2. Viggāhikakathā Sutta.– A monk should not indulge in wordy warfare — “You don’t understand this Dhamma-
3. Tiracchānakathā Sutta.– A monk should not indulge in animal talk (Tiracchāna Kathā) — e.g., about kings, robbers, ministers, etc., but should speak only of suffering and things connected therewith. S.v.419 f.