The Prophet (sallalahu alayhi wasalam) said: "Whoever takes 7 Ajwa dates in the morning will not be affected by poison or magic on that day. Bukhaari 5779
Ibn Abbas said; "I never saw the Messenger of Allah so keen to fast any day and give it priority over any other than this day, the day of Ashura, and the month of Ramadan. Bukhaari 1867