It is narrated from Mughira bin Sabi’ (may Allah have mercy on him) that whoever recites a few verses of Surah Al-Baqarah before sleeping will not forget the Qur’an; that is, four verses: “And your God is one God; there is no deity except Him, the Most Merciful, the Most Compassionate” (__QUR_N__), Ayat al-Kursi, and its last three verses.
Hadith Referenceسنن سعید بن منصور / كتاب التفسير / 138
Hadith Gradingمحدثین:سنده صحيح.
Hadith Takhrij«أخرجه الدارمي فى مسنده برقم: 3428 وسعيد بن منصور فى سننه برقم: 138»