The Prophet ﷺ said, Gabriel came to me and gave me the glad tidings that anyone who died without worshipping anything besides Allah, would enter Paradise. I asked (Gabriel), 'Even if he committed theft, and even if he committed illegal sexual intercourse?' He said, '(Yes), even if he committed theft, and even if he Committed illegal sexual intercourse." (Using translation from Bukhārī 7487)  

عَنِ النَّبِيِّ ﷺ قَالَ «أَتَانِي جِبْرِيلُ فَبَشَّرَنِي أَنَّهُ مَنْ مَاتَ مِنْ أُمَّتِكَ لَا يُشْرِكُ بِاللهِ شَيْئًا دَخَلَ الْجَنَّةَ» قُلْتُ وَإِنْ سَرَقَ وَإِنْ زَنَى؟ قَالَ «وَإِنْ سَرَقَ وَإِنْ زَنَى»  

[Machine] We were with the Messenger of Allah ﷺ on a journey, and during part of the night, he secluded himself for a long time. Then he came to us and said, "A messenger from my Lord came to me and informed me that whoever dies testifying that there is no deity worthy of worship except Allah will enter Paradise." I asked, "Even if he commits adultery or theft?" He replied, "Yes."  

كُنَّا مَعَ رَسُولِ اللهِ ﷺ فِي مَسِيرٍ لَهُ فَلَمَّا كَانَ فِي بَعْضِ اللَّيْلِ تَنَحَّى فَلَبِثَ طَوِيلًا ثُمَّ أَتَانَا فَقَالَ أَتَانِي آتٍ مِنْ رَبِّي فَأَخْبَرَنِي أَنَّهُ مَنْ مَاتَ يَشْهَدُ أَنْ لَا إِلَهَ إِلَّا اللهُ أَنَّ لَهُ الْجَنَّةُ قُلْتُ «وَإِنْ زَنَى وَإِنْ سَرَقَ؟» قَالَ نَعَمْ