Qur'an 9:101

وَمِمَّنْ حَوْلَكُم مِّنَ ٱلْأَعْرَابِ مُنَـٰفِقُونَ ۖ وَمِنْ أَهْلِ ٱلْمَدِينَةِ ۖ مَرَدُوا۟ عَلَى ٱلنِّفَاقِ لَا تَعْلَمُهُمْ ۖ نَحْنُ نَعْلَمُهُمْ ۚ سَنُعَذِّبُهُم مَّرَّتَيْنِ ثُمَّ يُرَدُّونَ إِلَىٰ عَذَابٍ عَظِيمٍ

“And among those around you of the bedouins are hypocrites, and [also] from the people of Madīnah. They have persisted in hypocrisy. You, [O Muḥammad], do not know them, [but] We know them. We will punish them twice [in this world]; then they will be returned to a great punishment.”

At-Tawba 9:101 · Saheeh International