The Prophet (peace and blessings of Allah be upon him) said: "When an adulterer commits illegal sexual intercourse, then he is not a believer at the time he is doing it, and when a drinker of an alcoholic liquor drinks it, then he is not a believer at the time of drinking it, and when a thief steals, then he is not a believer at the time of stealing, and when a robber robs, and the people look at him, then he is not a believer at the time of doing robbery." (Al-Bukhaari)

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“And come not near to unlawful sex. Verily, it is a Faahishah (i.e. anything that transgresses its limits: a great sin, and an evil way that leads one to Hell unless Allah forgives him)” [17:32 – interpretation of the meaning]

Regarding the Mi'raaj (ascension), in which the Prophet (peace and blessings of Allah be upon him) said:

"... then we proceeded and came to something like a tannoor (a kind of oven)." [The narrator] said: "I think he said, 'in which there were clamouring voices.'" He [the Prophet (peace and blessings of Allah be upon him)] said: "We looked into it and there we saw naked men and women. Flames were coming to them from the bottom of it, and when the flames reached them, they made an uproar. I said to them [i.e., the two angels who were accompanying him], 'Who are these?' They said, 'Proceed, proceed!'... I said to them, 'I have seen strange things this night. What is this that I have seen?' They said, 'We will tell you.... The naked men and women in the structure that resembled a tannoor oven are the adulterers and adulteresses.'" (Narrated by al-Bukhaari).

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