Tafsir of Al-Ma'aarij 70:37

Surah Al-Ma'arij (The Ascending Stairways): Verse 37

...to the right and to the left.

This is because they were gathered to his right and to his left.

The meaning of {عِزِينَ} (in groups/in parties):

• It means groups, and its singular form is ʿizzah. It refers to a band of people.
• Al-Azhari said: Its origin comes from the saying: ʿazzā fulānun nafsahu ilā Banī fulān (So-and-so attributed himself to the tribe of So-and-so), meaning he traced his lineage back to them (ʿazwan). The noun is ʿazwah.
• The ʿizzah was every group that attributed itself to one matter.
• Know that this word is a manqūṣ (a noun ending in a weak letter) whose pluralization with wāw and nūn (as ʿizīn) is permissible, serving as a replacement for the omitted letter. Its original form was ʿazwah. The discussion regarding this word is similar to the discussion concerning {عِضِينَ} (in factions) in Surah Al-Hijr (15:91), which has already been covered.
• It is also said that the mockers were five groups (arhaṭ).

Then He said:

! 7 < { Does every one of them wish to enter the Garden of Bliss? } > 7 !