Righteous works are mentioned in the Quran in these verses:
[2:158] The knolls of Safa and Marwah are among the rites decreed by God. Anyone who observes Hajj or `Umrah commits no error by traversing the distance between them. If one volunteers more righteous works, then God is Appreciative, Omniscient.
[2:184] Specific days (are designated for fasting); if one is ill or traveling, an equal number of other days may be substituted. Those who can fast, but with great difficulty, may substitute feeding one poor person for each day of breaking the fast. If one volunteers (more righteous works), it is better. But fasting is the best for you, if you only knew.
[3:114] They believe in God and the Last Day, they advocate righteousness and forbid evil, and they hasten to do righteous works. These are the righteous.
[4:114] There is nothing good about their private conferences, except for those who advocate charity, or righteous works, or making peace among the people. Anyone who does this, in response to God’s teachings, we will grant him a great recompense.
[11:114] You shall observe the Contact Prayers (Salat) at both ends of the day, and during the night. The righteous works wipe out the evil works. This is a reminder for those who would take heed.
[16:96] What you possess runs out, but what God possesses lasts forever. We will surely reward those who steadfastly persevere; we will recompense them for their righteous works.
[16:97] Anyone who works righteousness, male or female, while believing, we will surely grant them a happy life in this world, and we will surely pay them their full recompense (on the Day of Judgment) for their righteous works.
[18:46] Money and children are the joys of this life, but the righteous works provide an eternal recompense from your Lord, and a far better hope.
[23:61] They are eager to do righteous works; they compete in doing them.
[27:19] He smiled and laughed at her statement, and said, “My Lord, direct me to be appreciative of the blessings You have bestowed upon me and my parents, and to do the righteous works that please You. Admit me by Your mercy into the company of Your righteous servants.”
[29:7] Those who believe and lead a righteous life, we will certainly remit their sins, and will certainly reward them generously for their righteous works.
[35:10] Anyone seeking dignity should know that to God belongs all dignity. To Him ascends the good words, and He exalts the righteous works. As for those who scheme evil works, they incur severe retribution; the scheming of such people is destined to fail.
[46:15] We enjoined the human being to honor his parents. His mother bore him arduously, gave birth to him arduously, and took intimate care of him for thirty months. When he reaches maturity, and reaches the age of forty, he should say, “My Lord, direct me to appreciate the blessings You have bestowed upon me and upon my parents, and to do the righteous works that please You. Let my children be righteous as well. I have repented to You; I am a submitter.”
[46:16] It is from these that we accept the righteous works, and overlook their sins. They have deserved Paradise. This is the truthful promise that is promised to them.
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