A condition that reads as very small
Abū Dharr kept asking, and the answer kept being the same.
مَا مِنْ عَبْدٍ قَالَ لاَ إِلَهَ إِلاَّ اللَّهُ. ثُمَّ مَاتَ عَلَى ذَلِكَ، إِلاَّ دَخَلَ الْجَنَّةَ
No servant says there is no god but Allah and then dies upon that, except that he enters Paradise. I said: even if he commits adultery and steals? He said: even if he commits adultery and steals. Three times.
The full narration
Narrated Abu Dharr:I came to the Prophet (ﷺ) while he was wearing white clothes and sleeping. Then I went back to him again after he had got up from his sleep. He said, "Nobody says: 'None has the right to be worshipped but Allah' and then later on he dies while believing in that, except that he will enter Paradise." I said, "Even if he had committed illegal sexual intercourse and theft?" He said. 'Even if he had committed illegal sexual intercourse and theft." I said, "Even if he had committed illegal sexual intercourse and theft?" He said. 'Even if he had committed illegal sexual intercourse and theft." I said, 'Even it he had committed illegal sexual intercourse and theft?' He said, "Even if he had committed illegal sexual intercourse and theft, inspite of the Abu Dharr's dislike. Abu `Abdullah said, "This is at the time of death or before it if one repents and regrets and says "None has the right to be worshipped but Allah. He will be forgiven his sins
Source
Ṣaḥīḥ al-Bukhārī · 5827
- Agreed upon as authentic (al-Bukhārī / Muslim)