One verse

Bhagavad Gita 4.19

4.19

यस्य सर्वे समारम्भाः कामसङ्कल्पवर्जिताः | ज्ञानाग्निदग्धकर्माणं तमाहुः पण्डितं बुधाः ||४-१९||

yasya sarve samārambhāḥ kāmasaṅkalpavarjitāḥ . jñānāgnidagdhakarmāṇaṃ tamāhuḥ paṇḍitaṃ budhāḥ ||4-19||

yasya
one whose
sarve
all sorts of
samārambhāḥ
attempts
kāma
based on desire for sense gratification
saṅkalpa
determination
varjitāḥ
are devoid of
jñāna
of perfect knowledge
agni
by the fire
dagdha
burned
karmāṇam
whose work
tam
him
āhuḥ
declare
paṇḍitam
learned
budhāḥ
those who know

One is understood to be in full knowledge whose every endeavor is devoid of desire for sense gratification. He is said by sages to be a worker for whom the reactions of work have been burned up by the fire of perfect knowledge.