In this paper, we have dealt with the definition of caution linguistically and terminologically with a statement of the meanings of practical measures. We have indicated in the research the opinions of the scholars in matters related to caution against mixing with the people of passions and heresies, praying behind them and accepting their testimony, then we explained what is meant by astrologers and how to beware of them by presenting the opinions of the jurists and their legitimate evidence based on the Holy Quran and the Prophet's Sunnah with a statement of the preponderant opinion.