Sinners are mentioned in the Quran in these verses:
[5:106] O you who believe, witnessing a will when one of you is dying shall be done by two equitable people among you. If you are traveling, then two others may do the witnessing. After observing the Contact Prayer (Salat), let the witnesses swear by God, to alleviate your doubts: “We will not use this to attain personal gains, even if the testator is related to us. Nor will we conceal God’s testimony. Otherwise, we would be sinners.”
[40:58] Not equal are the blind and the seer. Nor are those who believe and work righteousness equal to the sinners. Rarely do you take heed.
[69:9] Pharaoh, others before him, and the sinners (of Sodom) were wicked.
[69:36] Nor any food, except the bitter variety.
[69:37] Food for the sinners.
To learn more, read the Quran in English.
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