Silsilat al-Ahadith al-Sahihah

Abdullah bin Abdur Rahman bin Abzi narrates from his father, who says: The Messenger of Allah (peace and blessings be upon him) taught us to recite this supplication in the morning: "We have entered the morning upon the natural religion of Islam, the word of sincerity, the religion of our Prophet Muhammad (peace and blessings be upon him), and the way of our father Ibrahim (peace be upon him), who was upright and a Muslim and was not among the polytheists."