Surah At-Tawbah 9:107

وَٱلَّذِينَ ٱتَّخَذُوا۟ مَسْجِدًا ضِرَارًا وَكُفْرًا وَتَفْرِيقًۢا بَيْنَ ٱلْمُؤْمِنِينَ وَإِرْصَادًا لِّمَنْ حَارَبَ ٱللَّهَ وَرَسُولَهُۥ مِن قَبْلُ ۚ وَلَيَحْلِفُنَّ إِنْ أَرَدْنَآ إِلَّا ٱلْحُسْنَىٰ ۖ وَٱللَّهُ يَشْهَدُ إِنَّهُمْ لَكَـٰذِبُونَ

And [there are] those [hypocrites] who took for themselves a mosque for causing harm and disbelief and division among the believers and as a station for whoever had warred against Allāh and His Messenger before. And they will surely swear, "We intended only the best." And Allāh testifies that indeed they are liars.

Translation: Saheeh International

Tafsir

And among them those who have chosen a mosque — these were twelve men from among the hypocrites — by way of harm to cause distress for those of the mosque of Qubā’ and disbelief since they built it on the orders of the monk Abū ‘Āmir as a sanctuary for him so that whoever comes from his side may stay there he had gone …

Excerpt from Tafsir al-Jalalayn, commentary on 9:107, via Quran.com. The reader has the full commentary and 9 more tafsirs.