Whoever goes to a soothsayer, asks him about something and believes him, his prayers will not be accepted for forty days. [Muslim]
"""من أتَى عرَّافًا فسأله عن شيء، فصدَّقه لم تُقْبَلْ له صلاةٌ أربعينَ يومًا"". [صحيح.] - [رواه مسلم.]"