yajñē tapasi dānē ca sthitiḥ saditi cōcyatē.
karma caiva tadarthīyaṅ sadityēvābhidhīyatē৷৷17.27৷৷
श्रीमद् भगवद्गीता
17.27 yajñē in sacrifice, tapasi in austerity, dānē in gift, ca and, sthitiḥ steadiness, sat Sat, iti thus, ca and, ucyatē is called, karma action, ca and, ēva also, tadarthīyam in connection with these or for the sake of the Supreme, sat Sat, iti thus, ēva even, abhidhīyatē is called.
Commentary:
If you perform sacrifice, austerity, gift and all actions in a spirit of total surrender to the Lord or the Eternal eing with purity and sincerity of heart, you will attain the highest goal of life or immortality, freedom and eternal bliss. If you do them in the name and for the sake of rahman you will attain perfection and supreme peace of the Absolute.If you pin your faith on the glory and power of this name 'Om' or 'Om Tat Sat', you will be freed from the bondage of birth and death. If you perform any sacrifice, austerity or charity or any action in a selfless and motiveless spirit, surrendering all the actions and their rewards to the Lord and if you utter the word 'Sat' with faith, feeling and devotion, you will attain perfection and success in the action.Even the imperfect and non-Sattvic acts of sacrifice, austerity and gift will be turned into perfect and Sattvic ones.These: Sacrifice, austerity and gift.