Mbh 12.12.3b

A person, again, who under the hypocritical garb of righteousness, fails to forget his desires (even while living in the woods), is bound by the grim King of death with his deadly fetters round the neck. Those acts that are done from vanity, are said to be unproductive of fruit. Those acts, on the other hand, O monarch, that are done from a spirit of renunciation, always bear abundant fruits.[26] Tranquillity, self-restraint, fortitude, truth, purity, simplicity, sacrifices, perseverance, and righteousness,--these are always regarded as virtues recommended by the Rishis. In domesticity, it is said, are acts intended for Pitris, gods, guests. In this mode of life alone, O monarch, are the threefold aims to be attained.[27] The renouncer that rigidly adheres to this mode of life, in which one is free to do all acts, has not to encounter ruin either here or hereafter. The sinless Lord of all creatures, of righteous soul, created creatures, with the intention that they would adore him by sacrifices with profuse presents. Creepers and trees and deciduous herbs, and animals that are clean, and clarified butter, were created as ingredients of sacrifice. For one in the observance of domesticity the performance of sacrifice is fraught with impediments. For this, that mode of life has been said to be exceedingly difficult and unattainable. Those persons, therefore, in the observance of the domestic mode of life, who, possessed of wealth and corn and animals, do not perform sacrifices, earn, O monarch, eternal sin. Amongst Rishis, there are some that regard the study of the Vedas to be a sacrifice, and some that regard contemplation to be a great sacrifice which they perform in their minds. The very gods, O monarch, covet the companionship of a regenerate person like this, who in consequence of his treading along such a way which consists in the concentration of the mind, has become equal to Brahma.