Moses himself stated that:
Deuteronomy 4:12-14 And the LORD spake unto you out of the midst of the fire: ye heard the voice of the words, but saw no similitude; only ye heard a voice. 13 And he declared unto you his covenant, which he commanded you to perform, even ten commandments; and he wrote them upon two tables of stone. 14 And the LORD commanded me at that time to teach you statutes and judgments, that ye might do them in the land whither ye go over to possess it.
The Lord Himself declared unto Israel the 10 Commandments. The statutes and judgements were declared unto Israel by the mouth of Moses. It is God Himself that wrote the 10 Commandments. By whom were the statutes and judgments written by?
Deuteronomy 31:24-26 And it came to pass, when Moses had made an end of writing the words of this law in a book, until they were finished, 25 That Moses commanded the Levites, which bare the ark of the covenant of the LORD, saying, 26 Take this book of the law, and put it in the side of the ark of the covenant of the LORD your God, that it may be there for a witness against thee.
Joshua 1:8 This book of the law shall not depart out of thy mouth; but thou shalt meditate therein day and night, that thou mayest observe to do according to all that is written therein: for then thou shalt make thy way prosperous, and then thou shalt have good success.
Joshua 8:31 As Moses the servant of the LORD commanded the children of Israel, as it is written in the book of the law of Moses, an altar of whole stones, over which no man hath lift up any iron: and they offered thereon burnt offerings unto the LORD, and sacrificed peace offerings.
Only the book of the law was given the name "the law of Moses". It was not the Tables of Testimony written with the finger of God that were given that name. This is essential to understand, for if we do not, we make erroneous assumptions, like that the Tables of Testimony are considered the law of Moses, which through rightly dividing the Word of God, we find that they are not. They are not the same thing.
Deuteronomy 4:12-14 And the LORD spake unto you out of the midst of the fire: ye heard the voice of the words, but saw no similitude; only ye heard a voice. 13 And he declared unto you his covenant, which he commanded you to perform, even ten commandments; and he wrote them upon two tables of stone. 14 And the LORD commanded me at that time to teach you statutes and judgments, that ye might do them in the land whither ye go over to possess it.
The Lord Himself declared unto Israel the 10 Commandments. The statutes and judgements were declared unto Israel by the mouth of Moses. It is God Himself that wrote the 10 Commandments. By whom were the statutes and judgments written by?
Deuteronomy 31:24-26 And it came to pass, when Moses had made an end of writing the words of this law in a book, until they were finished, 25 That Moses commanded the Levites, which bare the ark of the covenant of the LORD, saying, 26 Take this book of the law, and put it in the side of the ark of the covenant of the LORD your God, that it may be there for a witness against thee.
Joshua 1:8 This book of the law shall not depart out of thy mouth; but thou shalt meditate therein day and night, that thou mayest observe to do according to all that is written therein: for then thou shalt make thy way prosperous, and then thou shalt have good success.
Joshua 8:31 As Moses the servant of the LORD commanded the children of Israel, as it is written in the book of the law of Moses, an altar of whole stones, over which no man hath lift up any iron: and they offered thereon burnt offerings unto the LORD, and sacrificed peace offerings.
Only the book of the law was given the name "the law of Moses". It was not the Tables of Testimony written with the finger of God that were given that name. This is essential to understand, for if we do not, we make erroneous assumptions, like that the Tables of Testimony are considered the law of Moses, which through rightly dividing the Word of God, we find that they are not. They are not the same thing.