Deuteronomy 12:31-32

Wycliffe Bible

³¹ Thou shalt not do in like manner to thy Lord God (Thou shalt not worship the Lord thy God in like manner); for they did (un)to their gods all the abominations which the Lord loatheth, and they offered (up) their sons and their daughters, and they burnt them with fire.

³² Do thou to the Lord this thing only which I command to thee, neither add thou anything, neither abate. (Do thou to the Lord only the things which I command to thee, neither add thou anything, nor abate thou anything.)