Sahih Muslim

Ubaidullah b. 'Abdullah b. 'Utba reported:Ibn Abbas said to me: Do you know-and in the words of Harun (another narrator): Are you aware of-the last Sura which was revealed in the Qur'an as a whole? I said: Yes,"" When came the help from Allah and the victory"" (cx.). Thereupon, he said: You have told the truth. And in the narration of Abu Shaiba (the words are): Do you know the Sura? And he did not mention the words"" the last one