Surah Adh-Dhariyat 51:23

فَوَرَبِّ ٱلسَّمَآءِ وَٱلْأَرْضِ إِنَّهُۥ لَحَقٌّ مِّثْلَ مَآ أَنَّكُمْ تَنطِقُونَ

Then by the Lord of the heaven and earth, indeed, it is truth - just as [sure as] it is that you are speaking.

Translation: Saheeh International

Tafsir

So by the Lord of the heaven and the earth it that which you are promised is as assuredly true as the fact that you have power of speech read mithlu in the nominative as an adjective with the mā being extra; …

Excerpt from Tafsir al-Jalalayn, commentary on 51:23, via Quran.com. The reader has the full commentary and 9 more tafsirs.