'Says the Lord' in the Bible

[It will] not be like the Agreement that I made with their forefathers on the day I took them by the hand to lead them out of the country of Egypt. For they did not [continue to] keep my Agreement, so I did not regard them [as acceptable], says the Lord.

For this is the Agreement that I will make with the people of Israel in the coming days, says the Lord: I will put my laws into their minds, and I will also write them on their hearts. And I will be their God and they will be my people.