The second commandment requires the receiving, observing1 , and keeping pure and entire all such religious worship and ordinances as God has appointed in his Word.2
46 And he said unto them, Set your hearts unto all the words which I testify among you this day, which ye shall command your children to observe to do, all the words of this law.
Matthew 28:20
20 Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you alway, even unto the end of the world. Amen.
Deuteronomy 12:32
32 What thing soever I command you, observe to do it: thou shalt not add thereto, nor diminish from it.