In The Name of Allaah, The Most Merciful, The Bestower of Mercy

Ubaydullaah bin Abdullaah bin Utbah said: “Ibn Abbaas [radiyallaahu anhumaa] said to me: ‘Do you know the last Soorah of the Qur’aan to be revealed in full?’ I said: ‘Yes’; “When there comes the Help of Allaah and the Conquest.”[Surah An-Nasr]. He said: ‘You are right.'” And in another narration, [Ibn Abbaas said]: “Do you know which Soorah,” but did not say “the last Soorah.”
[Saheeh Muslim 3034]

Few Masaa’il From This Hadeeth

[1] Knowledge about revelation of the last sections [or parts] of the Qur’aan.

[2] Knowledge about that which was revealed completely as one Soorah.

[3] Knowledge about a particular Soorah.

[4] Ibn Abbaas’s [radiyallaahu humaa] knowledge regarding the noble Qur’aan.

[5] With regards to revelation of the Qur’aan, some was revealed between three and seven Aayaat, some in a number of Aayaat, and some revealed completely such as Surah An-Nasr.

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Arba’oona Hadeethaa Fee Uloomil Qur’aan. pages 104 -105. By Shaikh Muhammad Baazmool [hafidhahullaah]