The Prophet said: "The adulterer is not a believer at the moment when he is committing adultery, and the thief is not a believer at the moment when he is stealing, and the wine drinker is not a believer at the moment when he is drinking wine, and the robber is not a believer at the moment when he is robbing and taking something valuable by force while the Muslims are looking at it.'"
Sunan an-Nasa'i Book 51, Hadith 122
← Previous Hadith "The Messenger of Allah said: 'The adulterer is not a believer at the moment when he is committing adultery, and the wine drinker is not a believer at the moment when he is drinking wine, and the thief is not a believer at the moment when he is stealing, and the robber is not a believer at the moment when he is robbing and people are looking on.'"

Sunan an-Nasa'i Book 51, Hadith 121 Next Hadith → "The Messenger of Allah said: 'Whoever drinks Khamr, whip him; then if he drinks (again), whip him; then if he drinks (again), whip him; then if he drinks (again), kill him.'"

Sunan an-Nasa'i Book 51, Hadith 123