Oh my dear friend, there are plenty in the Bible, that make a very clear distinction between the law of Moses and the Law of God.
Dan. 9:10,11 "We have not obeyed the voice of the Lord our God, to walk in His laws, which He set before us by His servants the prophets. 11 Yes, all Israel has transgressed Your law, and has departed so as not to obey Your voice; therefore the curse and the oath written in the Law of Moses the servant of God have been poured out on us, because we have sinned against Him."
Daniel 9:10 is talking about God's law and verse 11 is talking about Moses' law.
Please note that God's law also called the 10 Commandments has existed at least as long as sin has existed. The Bible says, "Where no law is, there is no transgression [or sin]." Romans 4:15. So God's Ten Commandment law existed from the beginning. Men broke that law. "Whosoever committeth sin transgresseth also the law: for sin is the transgression of the law." 1 John 3:4 Because of sin (or breaking God's law), Moses law was given (or "added" Galatians 3:16, 19) till Christ should come and die. Two separate laws involved: God's law or 10 Commandments and Moses law.
The law of Moses, Called "Law contained in ordinances"
EPH. 2:15 Having abolished in his flesh the enmity, even the law of commandments contained in ordinances; for to make in himself of twain one new man, so making peace.
The Ten Commandments, Called "the Royal law"
JAMES 2:8 If ye fulfil the royal law according to the scripture, Thou shalt love thy neighbour as thyself, ye do well
Moses law; Written by Moses in a book
2 CHRON. 35:12 And they removed the burnt offerings, that they might give according to the divisions of the families of the people, to offer unto the LORD, as it is written in the book of Moses. And so did they with the oxen.
The Ten Commandments;Written by God on stone
EXO. 31:18 And he gave unto Moses, when he had made an end of communing with him upon mount Sinai, two tables of testimony, tables of stone, written with the finger of God.
EXO. 32:16 And the tables were the work of God, and the writing was the writing of God, graven upon the tables.
Moses law;Placed in the side of the ark
DEUT. 31:26 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.
The Ten Commandments; Placed inside the ark
EXO. 40:20 And he took and put the testimony into the ark, and set the staves on the ark, and put the mercy seat above upon the ark
Moses law; Ended at the cross
EPH. 2:15 Having abolished in his flesh the enmity, even the law of commandments contained in ordinances; for to make in himself of twain one new man, so making peace.
The Ten Commandments; Will stand forever
LUKE 16:17 And it is easier for heaven and earth to pass, than one tittle of the law to fail.
Moses law; Added because of sin
GAL. 3:19 Wherefore then serveth the law? It was added because of transgressions, till the seed should come to whom the promise was made; and it was ordained by angels in the hand of a mediator.
The Ten Commandments; Points out sin
ROM. 7:7 What shall we say then? is the law sin? God forbid. Nay, I had not known sin, but by the law: for I had not known lust, except the law had said, Thou shalt not covet.
ROM. 3:20 Therefore by the deeds of the law there shall no flesh be justified in his sight: for by the law is the knowledge of sin.
Moses law; Contrary to us, against us
COL. 2:14 Blotting out the handwriting of ordinances that was against us, which was contrary to us, and took it out of the way, nailing it to his cross.
The Ten Commandments; Not grievous
1 JOHN 5:3 For this is the love of God, that we keep his commandments: and his commandments are not grievous.
And many more!