I heard the Messenger of Allah ﷺ as saying: One who wrongfully takes an extra tax (sahib maks) will not enter Paradise. (Using translation from Abū Dāʾūd 2937)

سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ لَا يَدْخُلُ الْجَنَّةَ صَاحِبُ مَكْسٍ يَعْنِي الْعَشَّارَ