Adultery is mentioned in the Quran in these verses:

[4:15] Those who commit adultery among your women, you must have four witnesses against them, from among you. If they do bear witness, then you shall keep such women in their homes until they die, or until God creates an exit for them.

[4:16] The couple who commits adultery shall be punished. If they repent and reform, you shall leave them alone. God is Redeemer, Most Merciful.

[4:19] O you who believe, it is not lawful for you to inherit what the women leave behind, against their will. You shall not force them to give up anything you had given them, unless they commit a proven adultery. You shall treat them nicely. If you dislike them, you may dislike something wherein God has placed a lot of good.

[4:24] Also prohibited are the women who are already married, unless they flee their disbelieving husbands who are at war with you. These are God’s commandments to you. All other categories are permitted for you in marriage, so long as you pay them their due dowries. You shall maintain your morality, by not committing adultery. Thus, whoever you like among them, you shall pay them the dowry decreed for them. You commit no error by mutually agreeing to any adjustments to the dowry. God is Omniscient, Most Wise.

[4:25] Those among you who cannot afford to marry free believing women, may marry believing slave women. God knows best about your belief, and you are equal to one another, as far as belief is concerned. You shall obtain permission from their guardians before you marry them, and pay them their due dowry equitably. They shall maintain moral behavior, by not committing adultery, or having secret lovers. Once they are freed through marriage, if they commit adultery, their punishment shall be half of that for the free women. Marrying a slave shall be a last resort for those unable to wait. To be patient is better for you. God is Forgiver, Most Merciful.

[5:5] Today, all good food is made lawful for you. The food of the people of the scripture is lawful for you. Also, you may marry the chaste women among the believers, as well as the chaste women among the followers of previous scripture, provided you pay them their due dowries. You shall maintain chastity, not committing adultery, nor taking secret lovers. Anyone who rejects faith, all his work will be in vain, and in the Hereafter he will be with the losers.

[17:32] You shall not commit adultery; it is a gross sin, and an evil behavior.

[24:2] The adulteress and the adulterer you shall whip each of them a hundred lashes. Do not be swayed by pity from carrying out God’s law, if you truly believe in God and the Last Day. And let a group of believers witness their penalty.

[24:3] The adulterer will end up marrying an adulteress or an idol worshiper, and the adulteress will end up marrying an adulterer or an idol worshiper. This is prohibited for the believers.

[24:4] Those who accuse married women of adultery, then fail to produce four witnesses, you shall whip them eighty lashes, and do not accept any testimony from them; they are wicked.

[24:5] If they repent afterwards and reform, then God is Forgiver, Merciful.

[24:6] As for those who accuse their own spouses, without any other witnesses, then the testimony may be accepted if he swears by God four times that he is telling the truth.

[24:7] The fifth oath shall be to incur God’s condemnation upon him, if he was lying.

[24:8] She shall be considered innocent if she swears by God four times that he is a liar.

[24:9] The fifth oath shall incur God’s wrath upon her if he was telling the truth.

[24:10] This is God’s grace and mercy towards you. God is Redeemer, Most Wise.

[25:68] They never implore beside God any other god, nor do they kill anyone – for God has made life sacred – except in the course of justice. Nor do they commit adultery. Those who commit these offenses will have to pay.

[60:12] O you prophet, when the believing women (who abandoned the disbelievers) to seek asylum with you pledge to you that they will not set up any idols besides God, nor steal, nor commit adultery, nor kill their children, nor fabricate any falsehood, nor disobey your righteous orders, you shall accept their pledge, and pray to God to forgive them. God is Forgiver, Most Merciful.

[65:1] O you prophet, when you people divorce the women, you shall ensure that a divorce interim is fulfilled. You shall measure such an interim precisely. You shall reverence God your Lord. Do not evict them from their homes, nor shall you make life miserable for them, to force them to leave on their own, unless they commit a proven adultery. These are God’s laws. Anyone who transgresses God’s laws commits an injustice against himself. You never know; maybe God wills something good to come out of this.

To learn more, click here.

Learn about the Submitters also.