Kathāsutta untranslated

Kathāsutta 01. A monk should not indulge in childish talk – e.g., about kings, robbers, ministers, etc. – but should speak only of suffering and things connected therewith. SN.v.419f.

Kathāsutta 02. On the five qualities which help a monk who practises ānāpānasati to attain to the immovable state (akuppaṁ). These qualities include conversation which enlarges the mind. AN.iii.120f.