sad-bhāve sādhu-bhāve cha sad ity etat prayujyate
praśhaste karmaṇi tathā sach-chhabdaḥ pārtha yujyate||26||

Meaning : The word “Sat” (meaning “truth” or “being”) is used to describe what is good in nature and in noble people. It is also applied to excellent actions. O Pārtha (Arjuna), the word “Sat” is used for such things.