The Prophet said, "If somebody takes some 'Ajwa dates every morning, he will not be effected by poison or magic on that day till night." (Another narrator said seven dates).
Narrated Abdullah ibn Abbas:
The Prophet (peace_be_upon_him) said: If anyone acquires any knowledge of astrology, he acquires a branch of magic of which he gets more as long as he continues to do so.
Volume 7, Book 65, Number 356:
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 Abu Mas'ud:
The Prophet forbade the utilization of the price of a dog, the earnings of prostitute and the earnings of a foreteller
Some people asked Allah's Apostle about the fore-tellers He said. ' They are nothing" They said, 'O Allah's Apostle! Sometimes they tell us of a thing which turns out to be true." Allah's Apostle said, "A Jinn snatches that true word and pours it Into the ear of his friend (the fore-teller) (as one puts something into a bottle) The foreteller then mixes with that word one hundred lies."