The last two Verses of Surat Al-Baqarah
The Prophet (sal Allahu alaihi wa sallam) said, “He who recites the two Ayat at the end of Surat Al-Baqarah at night, they will suffice him.”
[Sahih Al-Bukhari and Muslim]
“Suffice him” here means that he will be protected from the evils. Another meaning given by the scholars is that these two Ayat (verses) will take the place of Tahajjud (optional prayer in the late hours of the night). Imam An-Nawawi (may Allah have mercy upon him) has cited the latter meaning.
And Allah knows best!