Bhagavad Gita 17.27

यज्ञे तपसि दाने च स्थितिः सदिति चोच्यते।कर्म चैव तदर्थीयं सदित्येवाभिधीयते॥

yajñe tapasi dāne ca sthitiḥ saditi cocyate |karma caiva tadarthīyaṃ sadityevābhidhīyate ||

Steadfastness in sacrifice, austerity, and gift is also called 'Sat', and action in connection with these, or for the sake of the Supreme, is also called 'Sat'.

Conviction in sacrifice, austerity, and giving is also called Sat. So too, an action done only for the Lord's sake.

Our plain-language meaning of this verse is waiting for scholar review.