Mbh 12.21.1a

"'Devasthana said, "In this connection is cited an old history, viz., the discourse that Vrihaspati, asked by Indra, delivered unto him. Vrihaspati said, 'Contentment is the highest heaven, contentment is the highest bliss. There is nothing higher than contentment. Contentment stands as the highest. When one draws away all his desires like a tortoise drawing in all its limbs, then the natural resplendence of his soul soon manifests itself. When one does not fear any creature, nor any creature is frightened at one, when one conquers one's desire and aversion, then is one said to behold one's soul. When one, indeed, in word and thought, seeks to injure nobody and cherishes no desire, one is said to attain to Brahma. Thus, O son of Kunti, whatever religion is followed by creatures, they obtain corresponding fruits. Awaken thyself by this consideration, O Bharata![67] Some praise Peacefulness, some praise Exertion; some there are that praise Contemplation; and some praise both Peacefulness and Exertion.[68] Some praise sacrifice; others, renunciation. Some praise gifts; others, acceptance. Some, abandoning everything, live in silent meditation. Some praise sovereignty and the cherishing of subjects, after slaying, cutting and piercing (foes). Some are for passing their days in retirement. Observing all this, the conclusion of the learned is that that religion which consists in not injuring any creature is worthy of the approbation of the righteous. Abstention from injury, truthfulness of speech, justice, compassion, self-restraint, procreation (of offspring) upon one's own wives, amiability, modesty, patience,--the practice of these is the best of a religions as said by the self-create Manu himself. Therefore, O son of Kunti, do thou observe this religion with care.