Mahabharata 10.2.16

10.2.16

yadi dakṣaḥ samārambhātkarmaṇāṃ nāśnute phalam |
nāsya vācyaṃ bhavetkiṃcittattvaṃ cāpyadhigacchati || 16 ||

Generally, an act performed is not seen to be unproductive of fruit in the world. The absent of action, again, is seen to be productive of grave misery. A person obtaining something of itself without having made any efforts, as also one not obtaining anything even after exertion, is not to be seen. One who is busy in action is capable of supporting life. He, on the other hand, that is idle, never obtains happiness. In this world of men it is generally seen that they that are addicted to action are always inspired by the desire of earning good. If one devoted to action succeeds in gaining his object or fails to obtain the fruit of his acts, he does not become censurable in any respect. If anyone in the world is seen to luxuriously enjoy the fruits of action without doing any action, he is generally seen to incur ridicule and become an object of hatred. He who, disregarding this rule about action, liveth otherwise, is said to do an injury to himself. This is the opinion of those that are endued with intelligence.