'My Covenant' in the Bible

They have turned back to the iniquities of their forefathers, who refused to hear my words; and they went after other gods to serve them: the house of Israel and the house of Judah have broken my covenant which I made with their fathers.

Not according to the covenant that I made with their fathers in the day that I took them by the hand to bring them out of the land of Egypt; which my covenant they broke, although I was a husband to them, saith the LORD:

Thus saith the LORD; If ye can break my covenant of the day, and my covenant of the night, so that there should not be day and night in their season;

Then also may my covenant be broken with David my servant, that he should not have a son to reign upon his throne; and with the Levites the priests, my ministers.

Thus saith the LORD; If my covenant is not with day and night, and if I have not appointed the ordinances of heaven and earth;

And I will give the men that have transgressed my covenant, who have not performed the words of the covenant which they had made before me, when they cut the calf in two, and passed between the parts of it,