Surah Al-Anbya — Ayah 56 (21:56)
قَالَ بَل رَّبُّكُمۡ رَبُّ ٱلسَّمَٰوَٰتِ وَٱلۡأَرۡضِ ٱلَّذِي فَطَرَهُنَّ وَأَنَا۠ عَلَىٰ ذَٰلِكُم مِّنَ ٱلشَّٰهِدِينَ ٥٦
English translation (Saheeh International)
He said, "[No], rather, your Lord is the Lord of the heavens and the earth who created them, and I, to that, am of those who testify.
Brief commentary
Abraham said, “No, I am serious! Your Lord is the Lord of the heavens and the earth; He created them without there having been anything like them previously. I am from those who testify that He is your Lord and the Lord of the heavens and the earth, and that your idols have no share in that!”