"The Messenger of Allah said: 'No one who commits Zina is a believer at the moment when he is committing Zina, and no one who drinks wine is a believer at the moment when he is drinking it, and no thief is a believer at the moment when he is stealing, and no killer is a believer at the moment he is killing
Sunan an-Nasa'i Book 45, Hadith 164
← Previous Hadith "The major sins are: associating others with Allah, disobeying parents, killing a souls (murder) and swearing a false oath knowingly.

Sunan an-Nasa'i Book 45, Hadith 163 Next Hadith → "No one who commits Zina is a believer at the moment when he is committing Zina; no one who steals is a believe at the moment when he is stealing; no one who drinks wine is a believer at the moment when he is drinking it; and no robber is a believer at the moment when he is robbing and the people are looking on.

Sunan an-Nasa'i Book 46, Hadith 1