AL HUJURAAT (KAMAR-KAMAR) — Ayat 17
يَمُنُّونَ عَلَيْكَ أَنْ أَسْلَمُوا قُل لَّا تَمُنُّوا عَلَيَّ إِسْلَامَكُم بَلِ اللَّهُ يَمُنُّ عَلَيْكُمْ أَنْ هَدَاكُمْ لِلْإِيمَانِ إِن كُنتُمْ صَادِقِينَ
They consider it a favor to you that they have accepted Islam. Say, "Do not consider your Islam a favor to me. Rather, Allah has conferred favor upon you that He has guided you to the faith, if you should be truthful."
Tafsir
{They do you a favor by becoming Muslims} without fighting, unlike others who became Muslims after fighting among them. {Say, “Do not do me a favor by your Islam”} is in the accusative case by removing the preposition “ba” and it is understood before “an” in both places. {Rather, God does you a favor by guiding you to faith, if you should be truthful} in your saying “we have believed.”