Surah Al-An'am 6:73

وَهُوَ ٱلَّذِى خَلَقَ ٱلسَّمَـٰوَٰتِ وَٱلْأَرْضَ بِٱلْحَقِّ ۖ وَيَوْمَ يَقُولُ كُن فَيَكُونُ ۚ قَوْلُهُ ٱلْحَقُّ ۚ وَلَهُ ٱلْمُلْكُ يَوْمَ يُنفَخُ فِى ٱلصُّورِ ۚ عَـٰلِمُ ٱلْغَيْبِ وَٱلشَّهَـٰدَةِ ۚ وَهُوَ ٱلْحَكِيمُ ٱلْخَبِيرُ

And it is He who created the heavens and earth in truth. And the day [i.e., whenever] He says, "Be," and it is, His word is the truth. And His is the dominion [on] the Day the Horn is blown. [He is] Knower of the unseen and the witnessed; and He is the Wise, the Aware.

Translation: Saheeh International

Tafsir

He it is Who created the heavens and the earth in truth that is to say with the purpose of manifesting truth. And mention the day He says to a thing ‘Be’ and it is — this is the Day of Resurrection when He says to creatures ‘Rise up’ and they do. His words are the truth the truth that will doubtless come to pass; …

Excerpt from Tafsir al-Jalalayn, commentary on 6:73, via Quran.com. The reader has the full commentary and 9 more tafsirs.