See Jeremiah 31:31-34 and Luke 22:14-23. This is language first used in Jeremiah's promise of rescue and renewal of the exiled people of God in Babylon. It promises a coming day when God would make a new covenant unlike the one which Israel had broken.
This is a re-recorded session as the original was not fully recorded.
While the author of Lamentations remains nameless within the book, strong evidence from both inside and outside the text points to the prophet Jeremiah...
Proverbs 30:10 Don't slander a servant to his master or he will curse you, and you will become guilty. Are people supposed to be...