Surah At-Tawbah — Ayah 17 (9:17)
مَا كَانَ لِلۡمُشۡرِكِينَ أَن يَعۡمُرُواْ مَسَٰجِدَ ٱللَّهِ شَٰهِدِينَ عَلَىٰٓ أَنفُسِهِم بِٱلۡكُفۡرِۚ أُوْلَٰٓئِكَ حَبِطَتۡ أَعۡمَٰلُهُمۡ وَفِي ٱلنَّارِ هُمۡ خَٰلِدُونَ ١٧
English translation (Saheeh International)
It is not for the polytheists to maintain the mosques of Allāh [while] witnessing against themselves with disbelief. [For] those, their deeds have become worthless, and in the Fire they will abide eternally.
Brief commentary
It is not right for the idolaters to attend or care for Allah’s places of worship, worshipping in them, or doing good actions in them, while confirming their disbelief through their displaying of polytheism and the like. Their actions are wasted because they do not have faith, and faith is the condition for actions being accepted. On the Day of Judgement, they will enter the fire of Hell, living in it eternally, unless they repent from idolatry before their death.