Surah Al-Anbya 21:16

وَمَا خَلَقْنَا ٱلسَّمَآءَ وَٱلْأَرْضَ وَمَا بَيْنَهُمَا لَـٰعِبِينَ

And We did not create the heaven and earth and that between them in play.

Translation: Saheeh International

Tafsir

And We did not create the heaven and the earth and all that is between them playing being frivolous but to indicate Our power and to benefit Our servants.

Excerpt from Tafsir al-Jalalayn, commentary on 21:16, via Quran.com. The reader has the full commentary and 9 more tafsirs.