tat tāmasam udāhṛtam

mudha-foolish; grahena-with endeavor; atmanah-of one's own self; yat-which; pidaya-by torture; kriyate-is performed; tapah-penance; parasya-to others; utsadanartham-causing annihilation; va-or; tat-that; tamasam-in the mode of darkness; udahrtam-is said to be.