1. Suddhaka Sutta. On the benefits of the four satipatthānas. S.v.173.
2. Suddhaka Sutta. On the six sense faculties. S.v.203.
3. Suddhaka Sutta. If cultivated and made much of, concentration on in breathing and out breathing is of great profit and point. S.v.313.
4. Suddhaka Sutta. The four qualities which make the Noble Disciple a sotāpanna. S.v.403.