The word(s) "sin" appears 521 time(s) in 480 verse(s) in Quran in Mohsin Khan translation.

(61) And the two persons (man and woman) among you who commit illegal sexual intercourse, hurt them both. And if they repent (promise Allah that they will never repeat, i.e. commit illegal sexual intercourse and other similar sins) and do righteous good deeds, leave them alone. Surely, Allah is Ever All-Forgiving (the One Who forgives and accepts repentance), (and He is) Most Merciful.

(62) But if you intend to replace a wife by another and you have given one of them a Qintar (of gold i.e. a great amount as Mahr) take not the least bit of it back; would you take it wrongfully without a right and (with) a manifest sin?

(63) Forbidden to you (for marriage) are: your mothers, your daughters, your sisters, your father's sisters, your mother's sisters, your brother's daughters, your sister's daughters, your foster mother who gave you suck, your foster milk suckling sisters, your wives' mothers, your step daughters under your guardianship, born of your wives to whom you have gone in - but there is no sin on you if you have not gone in them (to marry their daughters), - the wives of your sons who (spring) from your own loins, and two sisters in wedlock at the same time, except for what has already passed; verily, Allah is Oft-Forgiving, Most Merciful.

(64) Also (forbidden are) women already married, except those (slaves) whom your right hands possess. Thus has Allah ordained for you. All others are lawful, provided you seek (them in marriage) with Mahr (bridal-money given by the husband to his wife at the time of marriage) from your property, desiring chastity, not committing illegal sexual intercourse, so with those of whom you have enjoyed sexual relations, give them their Mahr as prescribed; but if after a Mahr is prescribed, you agree mutually (to give more), there is no sin on you. Surely, Allah is Ever All-Knowing, All-Wise.

(65) If you avoid the great sins which you are forbidden to do, We shall expiate from you your (small) sins, and admit you to a Noble Entrance (i.e. Paradise).

(66) On that day those who disbelieved and disobeyed the Messenger (Muhammad صلى الله عليه وسلم) will wish that they were buried in the earth, but they will never be able to hide a single fact from Allah.

(67) O you who believe! Approach not As-Salat (the prayer) when you are in a drunken state until you know (the meaning) of what you utter, nor when you are in a state of Janaba ,(i.e. in a state of sexual impurity and have not yet taken a bath) except when travelling on the road (without enough water, or just passing through a mosque), till you wash your whole body. And if you are ill, or on a journey, or one of you comes after answering the call of nature, or you have been in contact with women (by sexual relations) and you find no water, perform Tayammum with clean earth and rub therewith your faces and hands (Tayammum) . Truly, Allah is Ever Oft-Pardoning, Oft-Forgiving.

(68) Have you not seen those who were given a portion of the book (the Jews), purchasing the wrong path, and wish that you should go astray from the Right Path.

(69) Verily, Allah forgives not that partners should be set up with Him (in worship), but He forgives except that (anything else) to whom He wills; and whoever sets up partners with Allah in worship, he has indeed invented a tremendous sin.

(70) Look, how they invent a lie against Allah, and enough is that as a manifest sin.