It is narrated from Sayyiduna Hudhayfah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "I have been given the closing verses of Surah al-Baqarah from a treasure beneath the Throne."
Hadith Referenceالمعجم الكبير للطبراني / باب الحاء / 3012