It was narrated that ʿAlī said, “I did not think that any reasonable person could sleep without reciting the last verses of Sūrat al-Baqarah, and they are indeed treasures from beneath the Throne.” Reference:

Sunan al-Dārimī 3289

عَنْ أَبِي إِسْحَاق ، عَمَّنْ سَمِعَ عَلِيًّا ، يَقُولُ :" مَا كُنْتُ أَرَى أَنَّ أَحَدًا يَعْقِلُ يَنَامُ، حَتَّى يَقْرَأَ هَؤُلَاءِ الْآيَاتِ مِنْ آخِرِ سُورَةِ الْبَقَرَةِ ، وَإِنَّهُنَّ لَمِنْ كَنْزٍ تَحْتَ الْعَرْشِ.