The word of God which the Holy Spirit testifies, teaches, brings to remembrance and helps us to keep is made up of four levels.

Deuteronomy 6:17 and Deuteronomy 6:20

The 1st level is Statutes,

The 2nd level is judgements,

The 3rd level is Commandments,

& The 4th level is testimonies

1 Kings 2:3:

And keep the charge of the Lord your God: to walk in His ways, to keep His statutes, His commandments, His judgments, and His testimonies, as it is written in the Law of Moses, that you may prosper in all that you do and wherever you turn;

This word which the Holy Spirit brings unto us is referred to us the book of the Law:

Joshua 1:8
This Book of the Law shall not depart from your mouth, but you shall meditate in it day and night, that you may observe to do according to all that is written in it. For then you will make your way prosperous, and then you will have good success.

This same word is also known as the prophetic  words of the covenant, which God made with Abraham, Isaac and Jacob:

Deuteronomy 29:9
Therefore keep the words of this covenant, and do them, that you may prosper in all that you do.