It is narrated from Sayyiduna Abu Mas'ud (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "When a man recites the last two verses of Surah al-Baqarah at night, 'The Messenger has believed in what was revealed to him from his Lord', they will suffice him."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14616