Verse 53

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

We will soon show Our signs in the horizons and within themselves until it becomes clear to them that indeed this is the truth. Is it not sufficient that indeed your Lord witnesses all things?