Jeremiah 33

20 "I have made a covenant with the day and with the night, so that they always come at their proper times; and that covenant can never be broken. 21 In the same way I have made a covenant with my servant David that he would always have a descendant to be king, and I have made a covenant with the priests from the tribe of Levi that they would always serve me; and those covenants can never be broken.