One verse

Bhagavad Gita 17.26

17.26

सद्भावे साधुभावे च सदित्येतत्प्रयुज्यते | प्रशस्ते कर्मणि तथा सच्छब्दः पार्थ युज्यते ||१७-२६||

sadbhāve sādhubhāve ca sadityetatprayujyate . praśaste karmaṇi tathā sacchabdaḥ pārtha yujyate ||17-26||

sādhu-bhāve
in the sense of the nature of the devotee
ca
also
sat
the word sat
iti
thus
etat
this
prayujyate
is used
praśaste
in bona fide
karmaṇi
activities
tathā
also
sat-śabdaḥ
the sound sat
pārtha
O son of Pṛthā
yujyate
is used

The Absolute Truth is the objective of devotional sacrifice, and it is indicated by the word sat. The performer of such sacrifice is also called sat, as are all works of sacrifice, penance and charity which, true to the absolute nature, are performed to please the Supreme Person, O son of Pṛthā.