Mahabharata 12.261.22

12.261.22

caturdvāraṃ puruṣaṃ caturmukhaṃ caturdhā cainamupayāti nindā |
bāhubhyāṃ vāca udarādupasthātteṣāṃ dvāraṃ dvārapālo bubhūṣet || 22 ||

"Kapila said, '(If acts are obligatory, then) there are the Darsa, the Paurnamasa, the Agnihotra, the Chaturmasya, and other acts for the man of intelligence. In their performance is eternal merit. (Why then perform acts involving cruelty)? Those that have betaken themselves to the Sannyasa, mode of life, that abstain from all acts, that are endued with patience, that are cleansed (of wrath and every fault), and that are conversant with Brahma, succeed by such knowledge of Brahma in paying off the debts (thou speakest of) to the gods (the Rishis, and the Pitris) represented to be so very fond of libations poured in sacrifices. The very gods become stupefied in tracing the track of that trackless person who constitutes himself the soul of all creatures and who looks upon all creatures with an equal eye. Through instructions received from the preceptor one knows that which dwells within this frame to be of a four-fold nature, having besides four doors and four mouths. In consequence of (their possession of) two arms, the organ of speech, the stomach, and the organ of pleasure, the very gods are said to have four doors. One should, therefore, strive one's best to keep those doors under control. One should not gamble with dice. One should not appropriate what belongs to another. One should not assist at the sacrifice of a person of ignoble birth. One should not, giving way to wrath, smite another with hands or feet.