Surah Al-Anbya — Ayah 22 (21:22)
لَوۡ كَانَ فِيهِمَآ ءَالِهَةٌ إِلَّا ٱللَّهُ لَفَسَدَتَاۚ فَسُبۡحَٰنَ ٱللَّهِ رَبِّ ٱلۡعَرۡشِ عَمَّا يَصِفُونَ ٢٢
English translation (Saheeh International)
Had there been within them [i.e., the heavens and earth] gods besides Allāh, they both would have been ruined. So exalted is Allāh, Lord of the Throne, above what they describe.
Brief commentary
If there were numerous gods in the heavens and the earth, they would have been ruined, due to the gods disputing in the kingdom. But the reality is not like this. So Allah, Lord of the Throne, is pure of the lie the idolaters describe Him with, namely that He has partners.