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 und made much of, concentration on in breathing und out breathing is of great profit und point. S.v.313.
4. Suddhaka Sutta. The four qualities which make the Noble Disciple a sotāpanna. S.v.403.