Quran passages below focus on chastity, the sin of lust, the price paid in the inner life, and accountability before Allah.
"And do not go near zina. It is truly a shameful deed and an evil way." Quran 17:32
"Tell the believing men to lower their gaze and guard their chastity... and tell the believing women to lower their gaze and guard their chastity." Quran 24:30-31
"Successful indeed are the believers... those who guard their chastity... whoever seeks beyond that, then they are transgressors." Quran 23:1, 23:5-7
"Whoever does an atom's weight of good will see it, and whoever does an atom's weight of evil will see it." Quran 99:7-8
"The fornicatress and the fornicator, lash each one of them with a hundred lashes... and let a group of believers witness their punishment." Quran 24:2
"Every soul will taste death, then to Us you will be returned." Quran 29:57