Ayah 5:

وَالسَّمَاءِ وَمَا بَنَاهَا

(I swear) by the skies, and what (Maa) made it.

You would expect the word Man (who) would be used, for who made the skies. But What (Maa) is used.

Why Maa?

It can be used as a Maa al mawsoolah – a question of what that thing is. – What is that?

It could also be used as a Maa masdariyyah which is a sign of astonishment at the miraculousness of something.[The word maausually always implies a negation, i.e. What? i don’t.. etc.]

Ayah 4: I swear by the skies and Maa made it.

1- Maa al mawsoolah. Maa = what being made these skies? What kind of power must He be?
2 – Maa masdariyyah. Maa = how remarkable its construction (Astonishment. infinitive form of statment).

I swear by the sky, and how remarkable its construction is. I swear by the sky, and what [Power could] make it?

Banaa ha – the sky wasnt already there, it was constructed.

So in ayah 4, Allah is swearing by the Skies.

Wa maa banaha – and by what made it – So He is swearing by Himself too.

Banaa – comes from binaa – to fuse things together so they become inseparatable. This shows the amazingness of the sky that it covers and surrounds the Earth globe for our protection.

الَّذِي خَلَقَ سَبْعَ سَمَاوَاتٍ طِبَاقًا ۖ مَّا تَرَىٰ فِي خَلْقِ الرَّحْمَٰنِ مِن تَفَاوُتٍ ۖ فَارْجِعِ الْبَصَرَ هَلْ تَرَىٰ مِن فُطُورٍ[And] who created seven heavens in layers. You do not see in the creation of the Most Merciful any inconsistency. So return [your] vision [to the sky]; do you see any breaks?[al Mulk 67:3]

Do you see any cracks or flaws? Do you see any patchwork?

Even the most advanced designs of todays buildings and architecture require patching up. Yet they are no gaps in the sky so that we can see some parts of space through some gaps. Rather, it is all covered up fully for our safety and protection, and has remained that way for thousands/millions of years..