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Surah 25. Al-Furqan
Ayah 60
60 وَإِذَا قِيلَ لَهُمُ ٱسْجُدُوا۟ لِلرَّحْمَـٰنِ قَالُوا۟ وَمَا ٱلرَّحْمَـٰنُ أَنَسْجُدُ لِمَا تَأْمُرُنَا وَزَادَهُمْ نُفُورًا ۩
[60] When it is said to them. "Prostrate yourselves before the Merciful," they retort, "What is the Merciful? Would you have us prostrate ourselves before whomsoever you will?"73 And this invitation only helps to increase their hatred all the more.74
73This they said due to their arrogance and stubbornness just as Pharaoh had said to Prophet Moses: "What is the Lord of the universe?" For the disbelievers of Makkah were not unaware of the Merciful (Rahman), nor was Pharaoh unaware of the "Lord of the universe". The wording of the verse itself chows that their question about the "Merciful" was not the result of their ignorance of Him but was due to their rebelliousness; otherwise Allah would not have punished them for this but would have informed them politely that He Himself is "Merciful". Besides this, it is well known historically that the word Rahman (Merciful) for Allah had been in common usage in Arabia since the ancient times. Please see also E.N. 5 of As-Sajdah and E.N. 35 of Saba.
74All scholars are agreed that here a `Prostration of Recital' (Sajdah Talawat) has been enjoined, which means that every reader and every hearer must prostrate himself on reciting or hearing the recital of this verse. According to traditions, the one who hears this verse being recited should say: Zadan Allahu, khudu an-anima zada, lil-a`daa-i nufura: "May Allah increase us in humility even as the enemies are increased in their hatred."