Deuteronomy 12:32

What thing soever I command you, observe to do it
In the manner it is commanded and directed to; the laws of God, both as to matter and manner, were to be obeyed just as they were delivered: thou shall not add thereto, nor diminish from it; neither add any customs and rites of the Heathens to them, nor neglect anything enjoined on them, see ( Proverbs 30:6 ) ( Revelation 22:18 Revelation 22:19 ) .