The Prophet ﷺ said: If anyone acquires any knowledge of astrology, he acquires a branch of magic of which he gets more as long as he continues to do so.
قَالَ رَسُولُ اللَّهِ ﷺ مَنِ اقْتَبَسَ عِلْمًا مِنَ النُّجُومِ اقْتَبَسَ شُعْبَةً مِنَ السِّحْرِ زَادَ مَا زَادَ