Surah Sad 38:5

أَجَعَلَ ٱلْـَٔالِهَةَ إِلَـٰهًا وَٰحِدًا ۖ إِنَّ هَـٰذَا لَشَىْءٌ عُجَابٌ

Has he made the gods [only] one God? Indeed, this is a curious thing."

Translation: Saheeh International

Tafsir

Has he made the gods One God? — for he had said to them ‘Say there is no god except God’ — in other words they objected how could one god suffice for all of creation? Lo! that is indeed a curious thing’.

Excerpt from Tafsir al-Jalalayn, commentary on 38:5, via Quran.com. The reader has the full commentary and 9 more tafsirs.