From Sahih Bukhari (Hadith 1237):
Narrated Abu Dhar:Allah's Messenger (ﷺ) said, "Someone came to me from my Lord and gave me the news (or good tidings) that if any of my followers dies worshipping none (in any way) along with Allah, he will enter Paradise." I asked, "Even if he committed illegal sexual intercourse (adultery) and theft?" He replied, "Even if he committed illegal sexual intercourse (adultery) and theft
Reference: Bukhari 1237