Surah Yunus, Ayat 78-79

Ayat 78. They said: "Have you come to us to turn us away from that (Faith) we found our fathers following, - and that you two may have greatness in the land? We are not going to believe you two!"

Ayat 79. And Firaun (Pharaoh) said: "Bring to me every well-versed sorcerer."

Ayat 80. And when the sorcerers came, Musa (Moses) said to them: "Cast down what you want to cast!" 

Hazrat Safiyyah, daughter of Hazrat Abu Ubaid, on the authority of some of the wives of the Messenger of Allah  [SAWW](PBUH) who said, "He who goes to one who claims to tell about matters of the Unseen and believes in him, his Salat (prayers) will not be accepted for forty days.'' [Muslim Bk 26, Hadith Number 5540].

Lesson : as mentioned above in Surah Yunus Ayat 79. "And Firaun (Pharaoh) said: "Bring to me every well-versed sorcerer." We learn from this Hadith that visiting soothsayers, sorcerer and astrologers for the purpose of knowing from them what lies hidden in future is such a great offense that he who does it, loses all merits of his forty days Salat. Some people try to detect the culprits involved in a theft case through the so-called fortunetellers or seek their advice in matters relating to business, marriage etc. All such things are unlawful because Allah Alone knows the invisible world.