Slavery in the Qur’an

[2:178] O you who believe! The law of equality is prescribed to you in cases of murder: the free for the free, the slave for the slave, and the woman for the woman. But if the brother of the slain makes any remission, then grant any reasonable demand, and compensate him with handsome gratitude. This is a concession and a mercy from your Lord. After this, whoever exceeds the limits shall be in grave penalty.
[2:179] in the law of equality there is (saving of) life to you, O you people of understanding; that you may restrain yourselves.
[4:92] Never should a believer kill a believer; but (if it so happens) by mistake, (compensation is due); if one (so) kills a believer, it is ordained that he should free a believing slave, and pay compensation to the deceased's family, unless they remit it freely. If the deceased belonged to a people at war with you, and he was a believer, the freeing of a believing slave (is enough). If he belonged to a people with whom you have a treaty of mutual alliance, compensation should be paid to his family, and a believing slave be freed. For those who find this beyond their means, (is prescribed) a fast for two months running: by way of repentance to God; for God has all Knowledge and all Wisdom.
[5:89] God will not call you to account for what is futile in your oaths, but He will call you to account for your deliberate oaths: for expiation, feed ten indigent persons, on a scale of the average for the food of your families; or clothe them; or give a slave his freedom. If that is beyond your means, fast for three days. That is the expiation for the oaths you have sworn; but keep to your oaths. Thus God makes clear to you His Signs, so that you may be grateful.
[18:65] so they found one of Our servants, on whom We had bestowed mercy from Ourselves and whom We had taught knowledge from Our own Presence.
[58:3] But those who divorce their wives by way of zihar; then, wish to go back on the words they uttered, (it is ordained that such a one) should free a slave before they touch each other; these are what you are admonished to perform: and God is well-acquainted with (all) that you do.
[58:4] If any has not (the wherewithal), he should fast for two months consecutively before they touch each other. But if any is unable to do so, he should feed sixty indigent ones. This, that you may show your faith in God and His Messenger, those are limits (set by) God. For those who reject (Him), there is a grievous penalty.