I want to know what is the punishment for those who belives in what soothsayers and astrologers say?

All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.

What the soothsayers and astrologers claim is nothing but lies and nonsense which could mislead people. It is unlawful, according to the Sharee’ah, for any person who believes in Allah, His Messenger, and His revealed Books to go to soothsayers or astrologers, or to believe in anything of what they say.

Anybody who goes to them or believes them commits a major sin which could affect badly his own faith.

The Prophet said: “Whoever goes to a soothsayer or a fortune-teller and believes him, he has disbelieved in what was revealed to Muhammad ()”. And whoever goes to them and asks them about something, his prayers will not be accepted for forty days.” [Ahmad]

The Prophet also said: “Whoever goes to a fortune-teller and asks him, his prayers will not be accepted for forty nights (days).” [Muslim]

For more benefit on fortune-telling, please refer to Fataawa 225778, 228358, 328561, and 360988.

Allah knows best.