Fussilat 41:53

سَنُرِيهِمْ ءَايَـٰتِنَا فِى ٱلْـَٔافَاقِ وَفِىٓ أَنفُسِهِمْ حَتَّىٰ يَتَبَيَّنَ لَهُمْ أَنَّهُ ٱلْحَقُّ ۗ أَوَلَمْ يَكْفِ بِرَبِّكَ أَنَّهُۥ عَلَىٰ كُلِّ شَىْءٍ شَهِيدٌ

Sanurīhim āyātinā fī l-āfāqi wafī anfusihim ḥattā yatabayyana lahum annahu l-ḥaqu awalam yakfi birabbika annahu ʿalā kulli shayin shahīdun

We will show them Our signs in the horizons and within themselves until it becomes clear to them that it is the truth.¹ But is it not sufficient concerning your Lord that He is, over all things, a Witness?²