Sayyiduna Abu Hurayrah (may Allah be pleased with him) said: I heard the Messenger of Allah (peace and blessings be upon him); in the first of the two rak'ahs of Fajr he (peace and blessings be upon him) would recite "Say: We believe in Allah and in what has been sent down to us and what was sent down to Ibrahim, Isma'il, Ishaq and Ya'qub" [Surah al-Baqarah: 136] up to His words "and we submit to Him" [Surah al-Baqarah: 136], and in the second rak'ah "Our Lord, we have believed in what You sent down and have followed the Messenger, so register us among the witnesses" [Surah Al Imran: 53].
(b) Abd al-Aziz al-Darawardi was in doubt whether it was "Our Lord, we have believed in what You sent down" [Surah Al Imran: 53] or "Indeed, We have sent you with the truth as a bearer of good tidings and a warner, and you will not be asked about the companions of Hellfire" [Surah al-Baqarah: 119].
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4877