Musnad Ahmad 1528

It was narrated that "Abdullah bin ‘Abdur-Rahman bin Ma"mar said: “Amir bin Sa"d told "Umar bin ‘Abdul-"Azeez, when he was governor of Madinah, that Sa"d said: The Messenger of Allah (ﷺ) said:“Whoever eats seven "ajwah, dates from between the two lava fields of Madinah in the morning nothing will harm him that day until evening comes.” Fulaih said: I think he said: "And if he eats them in the evening, nothing will harm him until morning comes." ‘Umar said: O Amir! Watch what you are narrating from the Messenger of Allah (ﷺ), ‘Amir said: By Allah, I did not tell a lie about Sa"d, and Sa"d did not tell a lie about the Messenger of Allah (ﷺ).