Dream interpretation of hazrat ibn sirin (may allah have mercy on him) has said that if one sees a zunnar (a religious belt) in his hand, it means he will become weak in his faith. and if he sees that he has tied a zunnar around his waist, if the viewer is not pious, he will become a disbeliever. if he is pious, he will achieve justice from an enemy. and if he sees that he has cut and thrown away the zunnar, it means he will repent for his bad deeds and turn towards allah almighty, and will prefer the righteous path.