Mahabharata 3.33.9

3.33.9

tasya cāpi bhavetkāryaṃ vivṛddhau rakṣaṇe tathā |
bhakṣyamāṇo hyanāvāpaḥ kṣīyate himavānapi || 9 ||

There may or may not be even one in a thousand who truly knoweth the utility of acts or work. One must act for protecting as also increasing his wealth; for if without seeking to earn, one continueth to only spend, his wealth, even if it were a hoard huge as Himavat, would soon be exhausted. All the creatures in the world would have been exterminated, if there were no action. If also acts bore no fruits, creatures would never have multiplied. It is even seen that creatures sometimes perform acts that have no fruits, for without acts the course of life itself would be impossible. Those persons in the world who believe in destiny, and those again who believe in chance, are both the worst among men. Those only that believe in the efficacy of acts are laudable. He that lieth at ease, without activity, believing in destiny alone, is soon destroyed like an unburnt earthen pot in water. So also he that believeth in chance, i.e., sitteth inactive though capable of activity liveth not long, for his life is one of weakness and helplessness. If any person accidentally acquireth any wealth, it is said he deriveth it from chance, for no one's effort hath brought about the result. And, O son of Pritha, whatever of good fortune a person obtaineth in consequence of religious rites, that is called providential. The fruit, however that a person obtaineth by acting himself, and which is the direct result of those acts of his, is regarded as proof of personal ability.