Tirukkural-On Virtue-Fear of Evil-Kural 206

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The man who does not want to be consumed by evil, as by a burning disease,
Shall not ever think or do evil to others.

Parithiar would say that if a soul is to be free from suffering, it should not inflict suffering on others. When a person does evil to others, Nemesis shall surely overtake him, may be slowly but surely.

'He who digs a pit will fall into it.

(Proverbs 26:27)