Narrated Sa'ad (RA):
Allah's Apostle said, "He who eats seven 'Ajwa dates every morning, will not be affected by poison or magic on the day he eats them."
Narrated 'Aisha (RA):
A man called Labid bin al-A'sam from the tribe of Bani Zaraiq worked magic on Allah's Apostle till Allah's Apostle started imagining that he had done a thing that he had not really done. One day or one night he was with us, he invoked Allah and invoked for a long period, and then said, "O 'Aisha! Do you know that Allah has instructed me concerning the matter I have asked him about? Two men came to me and one of them sat near my head and the other near my feet. One of them said to his companion, "What is the disease of this man?" The other replied, "He is under the effect of magic.' The first one asked, 'Who has worked the magic on him?' The other replied, "Labid bin Al-A'sam.' The first one asked, 'What material did he use?' The other replied, 'A comb and the hairs stuck to it and the skin of pollen of a male date palm.' The first one asked, 'Where is that?' The other replied, '(That is) in the well of Dharwan;' " So Allah's Apostle along with some of his companions went there and came back saying, "O 'Aisha, the color of its water is like the infusion of Henna leaves. The tops of the date-palm trees near it are like the heads of the devils." I asked. "O Allah's Apostle? Why did you not show it (to the people)?" He said, "Since Allah cured me, I disliked to let evil spread among the people." Then he ordered that the well be filled up with earth.