1. Rūpa Sutta. Two of a group of suttas preached to Rāhula, to show him that all things are fleeting, unhappy and changeable. S.ii.245, 251.
2. Rūpa Sutta. He who realizes the impermanence of the body and the other khandhas becomes a sotāpanna. S.iii.225.
3. Rūpa Sutta. The cessation of suffering, disease, decay and death, is identical with the cessation of the five sense objects forms, sounds, etc. S.iii.229.
4. Rūpa Sutta. Desire and lust, which arise from forms, sounds, etc., are corruption of the heart; the getting rid of them leads to higher knowledge. S.iii.232.