In one narration the words are: "The last ten."
(Allamah al-Haythami says:) I say: In the "Sahih" this hadith is mentioned as: (whoever) recites its first ten verses.
Ahmad recorded it, and its narrators are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب التفسير / 11147