Sunan Abi Dawud

Narrated 'Abd Allah b. 'Abbas:The Messenger of Allah (ﷺ) used to recite in both rak'ahs of the dawn prayer: ""Say: We believe in Allah and in the revelation given to us"" (3:84) . This is in the first rak'ah and in the second rak'ah (he recited): ""We believe in Allah and bear witness that we submit ourself (to Him)."" (3:)