"So follow it, and do not follow the whims of those who do not know," meaning: the polytheists.
﴿فَاتَّبِعْهَا وَلا تَتَّبِعْ أَهْوَاءَ الَّذِينَ لَا يعلمُونَ﴾ يَعْنِي: الْمُشْركين