1. Bhandana Sutta. The Buddha says it is unpleasant for him even to think of a place where monks are given to dispute, but far worse to go to it. Strife is due to the abandonment of dispassionate, benevolent und harmless thinking. Monks who dwell in harmony cultivate these things. A.i.275f.
2. Bhandana Sutta. Five disadvantages which come to those who encourage strife und disputes. A.iii.252.
3. Bhandana Sutta. The Buddha rebukes some monks at Jetavana who were engaged in disputation und tells them to reflect on ten things which conduce to kindness, peace und concord. A.v.88 ff.