Conditions and circumstances (were revealed) surah after surah,

and every one of these surahs during the era of the Prophet - may Allah bless him and grant him peace - was preserved, mastered, and written,

but this surah was not recorded and compiled.

[The Quran in the era of Abu Bakr and Umar, may Allah be pleased with them:]

Then all of these surahs were recorded and compiled into a single volume with a special arrangement during the era of Abu Bakr and Umar - may Allah be pleased with them both - and this collection was named the Mushaf.

Division of the Surahs:

And these surahs were divided among the companions - may Allah be pleased with them - into four parts:

1 - The first: The seven long ones.

2 - The second: Al-Mi'in, which are the surahs each of which comprises one hundred verses or slightly more.

3 - The third: Al-Mathani: And it is what has fewer than one hundred verses.

4 - The fourth: Al-Mufassal.

And two or three surahs that are from the count of Al-Mathani were entered into Al-Mi'in in view of the suitability in their context with the context of Al-Mi'in, and thus some adjustment took place in some of the other parts.