'Says the Lord' in the Bible

For finding fault with them, he says, Behold the days are coming, says the Lord, and I will perfect upon the house of Israel and upon the house of Judah, a new covenant:

not according to the covenant which I made with their fathers, in the day that I took them by the hand to lead them out of the land of Egypt; because they abode not in my covenant, and I regarded them not, says the Lord.

Because this is my covenant which I will establish with the house of Israel after these days, says the Lord; having given my laws in their mind, I will also write them on their heart; and I will be to them a God, and they shall be unto me a people.

This is the covenant that I will make unto them after these days, says the Lord; having given my laws on their hearts, and I will also write them in their mind;