The Holy Quran 37:35 — Surah As-Saffat
Arabic text
إِنَّهُمْ كَانُوٓا۟ إِذَا قِيلَ لَهُمْ لَآ إِلَـٰهَ إِلَّا ٱللَّهُ يَسْتَكْبِرُونَ
Translation
They were the ones who were (too) proud (to accept) when they were told, "There is none worthy of worship but Allaah."
Tafsir (excerpt) — Tafsir Usmani
That is, their arrogance and pride prevent them from bringing to their tongues, at the bidding of the Prophet ﷺ, this phrase (لا اله الا الله — “There is no god but Allah”), by which their false objects of worship are negated — even though in their hearts they may consider it true.
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