Abdur-Rahman bin Yazid (the narrator says that most likely it is narrated from Abu Mas'ud (may Allah be pleased with him)) said that the Messenger of Allah (peace and blessings be upon him) said: "The last two verses of Surah al-Baqarah: whoever recites them at night, they will suffice him."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14620