There are sentient beings whose minds are stained by the twenty-one knots. Be aware that those people will fall into the lower realms. No good will come from it. What are the twenty-one knots?
Angry heart knot. Hateful to the heart. Sleep knot. Tease the knot. Doubt is a knot in the mind. Anger is a knot in the heart.
Avoid being knotted in the heart. Annoyance is a knot in the heart. Illness is a knot in the heart. Hatred is a knot in the heart. No shame. No guilt.
Illusion is a knot in the heart. Adultery is the knot of the heart. Fake as a knot of heart. Criticism is a knot in the heart. Sui is a knot in the heart. Slowness is a knot in the heart.
Jealousy is a knot in the heart. Increased slowness is a knot in the heart. Greed is the knot of the heart.
Monks. If someone has these twenty-one knots in his mind. It should be observed that such people will fall into the lower realms. No good will come from it.
——Excerpt from "Zengyi Agama Sutra"