Musnad Ahmad 457:29

Muhammad ibn Ja‘far narrated to us, he said: Shu‘bah narrated to us, and Hajjaj said: Shu‘bah informed us, from Mansur, from Ibrahim, from ‘Abd al-Rahman ibn Yazid, who said: I used to narrate a hadith from Abu Mas‘ud, so I met him while he was circumambulating the House (the Ka‘bah), and I asked him. He narrated from the Prophet, may Allah bless him and grant him peace, that he said: "Whoever recites the last two verses from Surat al-Baqarah in a night, they will suffice him."