وَإِنَّهُ فِي أُمِّ الْكِتَابِ لَدَيْنَا لَعَلِيٌّ حَكِيمٌ ﴿٤﴾

And verily, it is in the Mother of the Book with Us, indeed exalted, full of wisdom.

This explains the high status of the Qur'an among the hosts on high (the angels), so that the people of earth will respect it, venerate it and obey it.

وَإِنَّهُ (And verily, it),

means, the Qur'an,

فِي أُمِّ الْكِتَاب (is in the Mother of the Book),

meaning, Al-Lawh Al-Mahfuz (the Preserved Tablet).

This was the view of Ibn `Abbas and Mujahid.

لَدَيْنَا (with Us,)

means, in Our presence.

This was the view of Qatadah and others.

لَعَلِيٌّ (indeed exalted),

means, occupying a position of honor and virtue.

This was the view of Qatadah.

حَكِيمٌ (full of wisdom),

means, clear, with no confusion or deviation.

All of this indicates its noble status and virtue, as Allah says elsewhere:

إِنَّهُ لَقُرْءَانٌ كَرِيمٌ

فِى كِتَـبٍ مَّكْنُونٍ

لاَّ يَمَسُّهُ إِلاَّ الْمُطَهَّرُونَ

تَنزِيلٌ مِّن رَّبِّ الْعَـلَمِينَ

That (this) is indeed an honorable recitation. In a Book well-guarded. Which none can touch but the pure. A revelation from the Lord of the all that exists. (56:77-80)

كَلاَّ إِنَّهَا تَذْكِرَةٌ

فَمَن شَآءَ ذَكَرَهُ

فَى صُحُفٍ مُّكَرَّمَةٍ

مَّرْفُوعَةٍ مُّطَهَّرَةٍ

بِأَيْدِى سَفَرَةٍ كِرَامٍ بَرَرَةٍ

Nay, indeed it is an admonition. So whoever wills, let him pay attention to it. (It is) in Records held (greatly) in honor, exalted, purified, in the hands of scribes (angels), honorable and obedient. (80:11-16)