Bhagavad Gita Chapter 3 Verse 13
भगवद् गीता अध्याय 3 श्लोक 13

यज्ञशिष्टाशिनः सन्तो मुच्यन्ते सर्वकिल्बिषैः।
भुञ्जते ते त्वघं पापा ये पचन्त्यात्मकारणात्।।3.13।।



हिंदी अनुवाद - स्वामी रामसुख दास जी ( भगवद् गीता 3.13)
।।3.13।।यज्ञशेष(योग) का अनुभव करनेवाले श्रेष्ठ मनुष्य सम्पूर्ण पापोंसे मुक्त हो जाते हैं। परन्तु जो केवल अपने लिये ही पकाते अर्थात् सब कर्म करते हैं वे पापीलोग तो पापका ही भक्षण करते हैं।


English Translation of Sanskrit Commentary By Sri Shankaracharya's
3.13 Those again, who are yajna-sista-asinah, partakers of the remnants of sacrifices, who, after making offering to the gods and others, [The panca-maha-yajnas, five great offerings, which have to be made by every householder are offerings to gods, manes, humans, creatures and rsis (sages).] are habituated to eat the remnants (of those offerings), called nectar; they, santah, by being (so); mucyante, become freed; sarva-kilbisaih, from all sins-from those sins incurred through the five things [the five things are; oven, water-pot, cutting instruments, grinding machines and broom. A householder incurs sin by killing insects etc. with these things, knowingly or unknowingly. It is atoned by making the aforesaid five offerings.], viz oven etc., and also from those others incurred owing to injury etc. caused inadvertently. Tu, but; the papah, unholy persons, who are selfish; ye, who; pacanti, cook; atma-karanat, for themselves; te, they, being themselves sinful; bhunjate, incur; agham, sin.
For the following reasons also actions should be undertaken by an eligible person. Action is definitely the cause of the movement of the wheel of the world. How? This is being answered:


English Translation of Commentary  - Dr. S. Sankaranarayan
3.13 Yajnasista-etc.  Those who enjoy the pleasures of obects that have come to them on the authority of laws enjoining what is to be necessarily performed; and who enjoy them viewing  [the enjoyment]  only as a secondary (or intermediate) action and conseently as a subsidiary having no separate purpose;  and again those who enjoy the remnant of the necessary action  in the form of gratifying the group of the devas of the snese-organs-that residue of  food marked with bliss in being firmly established in their own Self - that is to say,  those who have mounted upon the Self and are desirous of enjoying objects only as a means to achieve this end - they are freed from all  faults of good and bad.  Those, who for their own selves etc. :  On the other hand, those who believe, under the  influence of ignorance, the sheer superficial enjoyment of objects as their final goal, and act with the notion  We perform this  [act] for the sake of ourselves - those persons alone gain the sin in the form of good and bad.


English Translation of Ramanuja's Sanskrit Commentary
3.13 Those persons who acire food materials solely for propitiating the Supreme Person abiding as the Self of Indra and other deities, and who, after cooking them, propitiate, through them, the Supreme Person as He is, and then sustain themselves on the remnants of oblations (made for such propitiation), they alone will be free of impurities which have resulted from beginningless evil and which are inimical to the vision of the self. But they are evil-minded, who acire for selfish use the things which the Supreme Being, abiding as the Self of Indra and other deities, has granted them for worshipping Him with, and use it all on the other hand for feeding themselves - they eat only sin. Turning away from the vision of the self, they cook only for being led to Naraka (for the expiation of the sin incurred thery).

Sri Krsna says that, from the standpoint of the world as well as that of the scriptures, everything has its origin in sacrifice; and He speaks of the need for the performance of the sacrifices and of the blemish in not performing the same:


Transliteration Bhagavad Gita 3.13Yajnashishtaashinah santo muchyante sarva kilbishaih;
Bhunjate te twagham paapaa ye pachantyaatma kaaranaat.


Word Meanings Bhagavad Gita 3.13yajña-śhiṣhṭa—of remnants of food offered in sacrifice; aśhinaḥ—eaters; santaḥ—saintly persons; muchyante—are released; sarva—all kinds of; kilbiṣhaiḥ—from sins; bhuñjate—enjoy; te—they; tu—but; agham—sins; pāpāḥ—sinners; ye—who; pachanti—cook (food); ātma-kāraṇāt—for their own sake