1. Saṃvara Sutta.– Listen monks, I will teach about restraint and lack of restraint. There are sights pleasing to the eye, pleasing, delightful, and enticing. If a monk welcomes them, delights in them, and clings to them, he can know that he is falling away from wholesome states.
There are sounds pleasing to the ear … odours pleasing to the nose … tastes pleasing to the tongue … touches pleasing to the body … ideas pleasing to the mind, delightful, and enticing. If a monk welcomes them and clings to them, he can know that he is falling away from wholesome states. This is lack of restraint.
If a monk does not welcome them, delight in them or cling to them he can know that is not falling away from wholesome states. This is restraint. S.iv.79.
2. Saṃvara Sutta.– On the four efforts: to restrain, abandon, develop, and guard. A.ii.15.