SB 11.25.23

mad-arpaṇaṁ niṣphalaṁ vā
 sāttvikaṁ nija-karma tat
rājasaṁ phala-saṅkalpaṁ
 hiṁsā-prāyādi tāmasam
Synonyms: 
mat-arpaṇam — offered unto Me; niṣphalam — done without expectation of result; — 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.
Translation: 
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.
Purport: 

Ordinary work performed as an offering to God, without desire for the result, is understood to be in the mode of goodness, whereas activities of devotion — such as chanting and hearing the glories of the Lord — are transcendental forms of work beyond the modes of nature.