One verse

Srimad Bhagavatam 11.25.23

11.25.23

मदर्पणं निष्फलं वा सात्त्विकं निजकर्म तत् । राजसं फलसङ्कल्पं हिंसाप्रायादि तामसम् ॥ २३ ॥

mad-arpaṇaṁ niṣphalaṁ vā sāttvikaṁ nija-karma tat rājasaṁ phala-saṅkalpaṁ hiṁsā-prāyādi tāmasam

mat-arpaṇam
offered unto Me
niṣphalam
done without expectation of result
vā
and
sāttvikam
in the mode of goodness
nija
accepted as one’s prescribed duty
karma
work
tat
that
rājasam
in the mode of passion
phala-saṅkalpam
done in expectation of some result
hiṁsā-prāya-ādi
done with violence, envy and so on
tāmasam
in the mode of ignorance

Work performed as an offering to Me, without consideration of the fruit, is considered to be in the mode of goodness. Work performed with a desire to enjoy the results is in the mode of passion. And work impelled by violence and envy is in the mode of ignorance.