The Bhagavad Gita
2:47-51: You have a right to perform your prescribed duty, but you are not entitled to the fruits of action. Never consider yourself to be the cause of the results of your activities, and never be attached to not doing your duty. Be steadfast in yoga, O Arjuna. Perform your duty and abandon all attachment to success or failure. Such evenness of mind is called yoga. Dhananjaya, rid yourself of all fruitive activities by devotional service, and surrender fully to that consciousness. Those who want to enjoy the fruits of their work are misers. A man engaged in devotional service rids himself of both good and bad actions even in this life. Therefore, strive for yoga O Arjuna, which is the art of all work. The wise engaged in devotional service, take refuge in the Lord, and free themselves from the cycle of birth and death by renouncing the fruits of action in the material world. In this way they can attain that state beyond all miseries.
3:15: Every selfless act ... is born from Brahman, the eternal, infinite Godhead. He is present in every act of service.
3:25-27: As the ignorant perform their duties with attachment to results, similarly the learned may also act, but without attachment, for the sake of leading people on the right path. Let not the wise disrupt the minds of the ignorant who are attached to fruitive action. They should not be encouraged to refrain from work, but to engage in work in the spirit of devotion. The bewildered spirit soul, under the influence of the three modes of material nature, thinks himself to be the doer of activities, which are in actuality carried out by nature.
3:29-32: Bewildered by the modes of material nature, the ignorant fully engage themselves in material activities and become attached. But the wise should not unsettle them, although these duties are inferior due to the performers' lack of knowledge. Therefore, O Arjuna, surrendering all your works unto Me, with mind intent on Me, and without desire for gain and free from egoism and lethargy, fight. One who executes his duties according to My injunctions and who follows this teaching faithfully, without envy, becomes free from the bondage of fruitive actions. But those who, out of envy, disregard these teachings and do not practice them regularly, are to be considered bereft of all knowledge, befooled, and doomed to ignorance and bondage.
3:38-39: ... knowledge is hidden by selfish desire - hidden by this unquenchable fire for self-satisfaction.
4:19-21: One is understood to be in full knowledge whose every act is devoid of desire for sense gratification. He is said by sages to be a worker whose fruitive action is burned up by the fire of perfect knowledge. Abandoning all attachment to the results of his activities, ever satisfied and independent, he performs no fruitive action, although engaged in all kinds of undertakings. Such a man of understanding acts with mind and intelligence perfectly controlled, gives up all sense of proprietorship over his possessions and acts only for the bare necessities of life. Thus working, he is not affected by sinful reactions.
5:14: The embodied spirit, master of the city of his body, does not create activities, nor does he induce people to act, nor does he create the fruits of action. All this is enacted by the modes of material nature.
6:4: A person is said to be elevated in yoga when, having renounced all material desires, he neither acts for sense gratification nor engages in fruitive activities.
6:10: A transcendentalist should always try to concentrate his mind on the Supreme Self; he should live alone in a secluded place and should always carefully control his mind. He should be free from desires and feelings of possessiveness. The Supreme Lord said: To give up the results of all activities is called renunciation [tyaga] by the wise. And that state is called the renounced order of life [sannyasa] by great learned men.
12.3-4: But those who fully worship the unmanifested, that which lies beyond the perception of the senses, the all-pervading, inconceivable, unchanging, fixed and immovable--the impersonal conception of the Absolute Truth--by controlling the various senses and being equally disposed to everyone, such persons, engaged in the welfare of all, at last achieve Me.
12.13-15: One who is not envious but is a kind friend to all living entities, who does not think himself a proprietor and is free from false ego, who is equal in both happiness and distress, who is tolerant, always satisfied, self-controlled, and engaged in devotional service with deter-mination, his mind and intelligence fixed on Mesuch a devotee of Mine is very dear to Me. He for whom no one is put into difficulty and who is not disturbed by anyone, who is equipoised in happiness and distress, fear and anxiety, is very dear to Me.
16:11 -18: They believe that to gratify the senses unto the end of life is the prime necessity of human civilization. Thus there is no end to their anxiety. Being bound by hundreds and thousands of desires, by lust and anger, they secure money by illegal means for sense gratification. The demoniac person thinks: 'So much wealth do I have today, and I will gain more and more according to my schemes. So much is mine now, and it will increase in the future, more and more. He is my enemy and I have killed him, and my other enemy will also be killed. I am the lord of everything, I am the enjoyer, I am perfect, powerful and happy. I am the richest man, surrounded by aristocratic relatives. There is none so powerful and happy as I am. I shall perform sacrifices, I shall give some charity, and thus I shall rejoice.' In this way, such persons are deluded by ignorance. Bound by their greed and entangled in a web of delusion, whirled about by a fragmented mind, they fall into a dark hell. Self-important, obstinate, swept away by the pride of wealth, they ostentatiously perform sacrifices without any regard for their purpose. Egotistical, violent, arrogant, lustful, angry, envious of everyone, they abuse my presence within their own bodies and in the bodies of others.
16.21: There are three gates leading to this hell--lust, anger and greed. Every sane man should give these up, for they lead to the degradation of the soul.
18.47: It is better to engage in one's own occupation, even though one may perform it imperfectly, than to accept another's occupation and perform it perfectly. Prescribed duties, according to one's nature, are never affected by sinful reactions.
18.54: One who is thus transcendentally situated at once realizes the Supreme Brahman and becomes fully joyful. He never laments nor desires to have anything. He is equally disposed toward every living entity. In that state he attains pure devotional service unto Me.
The Bhagavad Gita is one of the chief texts of Hinduism, and is believed to have been written in India around 2000 years ago, although the exact date of its composition is a matter of dispute.