50:6
أَفَلَمْ يَنظُرُوٓا۟ إِلَى ٱلسَّمَآءِ فَوْقَهُمْ كَيْفَ بَنَيْنَـٰهَا وَزَيَّنَّـٰهَا وَمَا لَهَا مِن فُرُوجٍ
Have they not looked at the heaven above them - how We structured it and adorned it and [how] it has no rifts?
Qaf
أَفَلَمْ يَنظُرُوٓا۟ إِلَى ٱلسَّمَآءِ فَوْقَهُمْ كَيْفَ بَنَيْنَـٰهَا وَزَيَّنَّـٰهَا وَمَا لَهَا مِن فُرُوجٍ
Have they not looked at the heaven above them - how We structured it and adorned it and [how] it has no rifts?
Nearby ayahs help place verse 50:6 in sequence and meaning.
قَدْ عَلِمْنَا مَا تَنقُصُ ٱلْأَرْضُ مِنْهُمْ ۖ وَعِندَنَا كِتَـٰبٌ حَفِيظٌۢ
We know what the earth diminishes of them, and with Us is a retaining record.
بَلْ كَذَّبُوا۟ بِٱلْحَقِّ لَمَّا جَآءَهُمْ فَهُمْ فِىٓ أَمْرٍ مَّرِيجٍ
But they denied the truth when it came to them, so they are in a confused condition.
وَٱلْأَرْضَ مَدَدْنَـٰهَا وَأَلْقَيْنَا فِيهَا رَوَٰسِىَ وَأَنۢبَتْنَا فِيهَا مِن كُلِّ زَوْجٍۭ بَهِيجٍ
And the earth - We spread it out and cast therein firmly set mountains and made grow therein [something] of every beautiful kind,
تَبْصِرَةً وَذِكْرَىٰ لِكُلِّ عَبْدٍ مُّنِيبٍ
Giving insight and a reminder for every servant who turns [to Allah].