لَا يَزَالُ بُنْيَـٰنُهُمُ ٱلَّذِى بَنَوْا۟ رِيبَةً فِى قُلُوبِهِمْ إِلَّآ أَن تَقَطَّعَ قُلُوبُهُمْ ۗ وَٱللَّهُ عَلِيمٌ حَكِيمٌ
“The building which they erected will never cease to fuel hypocrisy in their hearts until their hearts are torn apart. And Allah is All-Knowing, All-Wise.”
This ayah is Surat at-Tawba's explicit condemnation of Masjid al-Dirar (9:107-110), the very mosque described at this event.