श्रीमद् भगवद्गीता

मूल श्लोकः

यज्ञे तपसि दाने च स्थितिः सदिति चोच्यते।

कर्म चैव तदर्थीयं सदित्येवाभिधीयते।।17.27।।

English Translation By Swami Adidevananda

17.27 Devotion to sacrifice, austerities and gifts is also called Sat; and so any act for such purposes is named Sat.