CC Madhya 24.27

‘hetu’-śabde kahe — bhukti-ādi vāñchāntare
bhukti, siddhi, mukti — mukhya ei tina prakāre
Synonyms: 
hetu-śabde — by the word hetu; kahe — it is said; bhukti — enjoying the result by oneself; ādi — and so on; vāñchā-antare — because of a different ambition; bhukti — enjoying the result of action; siddhi — the perfection of doing something; mukti — liberation; mukhya — chief; ei — these; tina prakāre — in three ways.
Translation: 
“The word ‘hetu’ [‘cause’] means that a thing is done for some motive. There can be three motives. One may act to enjoy the result personally, to achieve some material perfection, or to attain liberation.