Surah Al-A'raf — Ayah 166 (7:166)
فَلَمَّا عَتَوۡاْ عَن مَّا نُهُواْ عَنۡهُ قُلۡنَا لَهُمۡ كُونُواْ قِرَدَةً خَٰسِـِٔينَ ١٦٦
English translation (Saheeh International)
So when they were insolent about that which they had been forbidden, We said to them, "Be apes, despised."
Brief commentary
When they overstepped the limits, rebelling against Allah out of pride and stubbornness, and they would not be advised, Allah told them: 'O you disobedient ones! Be you monkeys, humiliated!' So they became what He willed, because when He wills something He only says to it ‘Be!’ and it is.