these are nothing but names that you and your forefathers have invented for which allah has sent down no authority. they are merely following their conjectures and their carnal desires although guidance has come to them from their lord.
إن هي إلا أسماء سميتموها أنتم وآباؤكم ما أنزل الله بها من سلطان إن يتبعون إلا الظن وما تهوى الأنفس ولقد جاءهم من ربهم الهدى