الْأَعْرَابُ أَشَدُّ كُفْرًا وَنِفَاقًا وَأَجْدَرُ أَلَّا يَعْلَمُوا حُدُودَ مَا أَنزَلَ اللَّهُ عَلَىٰ رَسُولِهِ ۗ وَاللَّهُ عَلِيمٌ حَكِيمٌ
“The Bedouins [around Madinah] are far worse in disbelief and hypocrisy, and less likely to know the laws revealed by Allah to His Messenger. And Allah is All-Knowing, All-Wise.”
Part of the well-established hypocrites-who-stayed-behind-from-Tabuk passage of Surat al-Tawbah.