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यज्ञे तपसि दाने च स्थितिः सदिति चोच्यते।कर्म चैव तदर्थीयं सदित्येवाभिधीयते।।17.27।।
17.27 Conviction in sacrifice, in austerity and in giving is also called Sat.' So too an action done only for the Lord's sake.