Mbh 5.40.1c

Carefully listening to these words, if thou canst act according to them, thou wilt obtain great fame in this world of men, and fear will not be thine here or hereafter. O Bharata, the soul is spoken of as a river; religious merit constitutes its sacred baths; truth, its water; self-control, its banks; kindness, its waves. He that is righteous purifieth himself by a bath therein, for the soul is sacred, and the absence of desire is the highest merit. O king, life is a river whose waters are the five senses, and whose crocodiles and sharks are desire and anger. Making self-control thy raft, cross thou its eddies which are represented by repeated births! Worshipping and gratifying friends that are eminent in wisdom, virtue, learning, and years, he that asketh their advice about what he should do and should not do, is never misled. One should restrain one’s lust and stomach by patience; one’s hands and feet by one’s eyes; one’s eyes and ears by one’s mind; and one’s mind and words by one’s acts. That Brahmana who never omitteth to perform his ablutions, who always weareth his sacred thread, who always attendeth to the study of the Vedas, who always avoideth food that is unclean, who telleth the truth and performeth acts in honour of his preceptor, never falleth off from the region of Brahma. Having studied the Vedas, poured libations into fire, performed sacrifices, protected subjects, sanctified his soul by drawing weapons for protecting kine and Brahmanas, and died on the field of battle, the Kshatriya attaineth to heaven. Having studied the Vedas, and distributed in proper time, his wealth among Brahmanas, Kshatriyas, and his own dependents, and inhaled the sanctified smoke of the three kinds of fires, the Vaisya enjoyeth heavenly bliss in the other world. Having properly worshipped Brahmanas, Kshatriyas, and Vaisyas in due order, and having burnt his sins, by gratifying them, and then peacefully casting off his body, the Sudra enjoyeth the bliss of heaven.