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suyuti:14273a
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السيوطي:١٤٢٧٣a

"ذَنْبٌ لَا يُغْفَرُ، وَذَنْبٌ لَا يُتْرَكُ، وَذَنْبٌ يُغْفرُ, فَأمَّا الَّذِى لَا يُغْفَرُ: فَالشِّركُ باللَّهِ، وأَمَّا الَّذِى يُغْفَرُ: فَذَنبُ العَبْدِ بَيْنَهُ وَبَيْنَ اللَّهُ ﷻ وأَمَّا الذى لَا يُترَكُ: فَظُلمُ العِبَادِ بعضِهم بَعْضًا".  

[طب] الطبرانى في الكبير عن سلمان

See similar narrations below:

Collected by Ṭabarānī
tabarani:6133

[Machine] The Messenger of Allah ﷺ said, "There is a sin that cannot be forgiven, a sin that will not be abandoned, and a sin that will be forgiven. As for the sin that cannot be forgiven, it is associating partners with Allah. As for the sin that will not be abandoned, it is the injustice of people towards one another."  

الطبراني:٦١٣٣وَبِإِسْنَادِهِ قَالَ

قَالَ رَسُولُ اللهِ ﷺ «ذَنْبٌ لَا يُغْفَرُ وَذَنْبٌ لَا يُتْرَكُ وَذَنْبٌ يُغْفَرُ فَأَمَّا الَّذِي لَا يُغْفَرُ فَالشِّرْكُ بِاللهِ وَأَمَّا الَّذِي يُغْفَرُ فَذَنْبٌ بَيْنَهُ وَبَيْنَ اللهِ ﷻ وَأَمَّا الَّذِي لَا يُتْرَكُ فَظُلْمُ الْعِبَادِ بَعْضُهُمْ بَعْضًا»