Sahih al-Bukhari 6810
Narrated Abu Huraira:
The Prophet (ﷺ) said, "The one who commits an illegal sexual intercourse is not a believer at the time of 
committing illegal sexual intercourse and a thief is not a believer at the time of committing theft and a 
drinker of alcoholic drink is not a believer at the time of drinking. Yet, (the gate of) repentance is open 
thereafter."
حَدَّثَنَا آدَمُ، حَدَّثَنَا شُعْبَةُ، عَنِ الأَعْمَشِ، عَنْ ذَكْوَانَ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم ‏
"‏ لاَ يَزْنِي الزَّانِي حِينَ يَزْنِي وَهْوَ مُؤْمِنٌ، وَلاَ يَسْرِقُ حِينَ يَسْرِقُ وَهْوَ مُؤْمِنٌ، وَلاَ يَشْرَبُ حِينَ يَشْرَبُهَا وَهْوَ مُؤْمِنٌ، وَالتَّوْبَةُ مَعْرُوضَةٌ بَعْدُ ‏"‏‏.‏