श्रीमद् भगवद्गीता

मूल श्लोकः

यज्ञे तपसि दाने च स्थितिः सदिति चोच्यते।

कर्म चैव तदर्थीयं सदित्येवाभिधीयते।।17.27।।

English Translation by Shri Purohit Swami

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.