18. Then We have put you (O Muhammad صلى الله عليه و سلم) on a (plain) way of (Our) commandment [like the one which We commanded Our Messengers before you (i.e. legal ways and laws of the Islâmic Monotheism)]. So follow you that (Islâmic Monotheism and its laws), and follow not the desires of those who know not. (Tafsir At-Tabarî).