Surah Al-Anbya — Ayah 16 (21:16)
وَمَا خَلَقۡنَا ٱلسَّمَآءَ وَٱلۡأَرۡضَ وَمَا بَيۡنَهُمَا لَٰعِبِينَ ١٦
English translation (Saheeh International)
And We did not create the heaven and earth and that between them in play.
Brief commentary
And I did not create the heavens and the earth and whatever is in between as a plaything or in vain, but rather I created them to show My power.