Jeremiah 33:18-22

And there will always be priests from the tribe of Levi to stand before me to offer burnt offerings, grain offering, and daily sacrifices to me.” YAHWEH spoke to me, saying, “I say to you that I, YAHWEH, have a covenant with the day and the night so that they always come at their appointed times. As no one can break the covenant I made with them, so no one can break the covenant I have made with my servant David and with the priests from the tribe of Levi who serve at my altar. A descendant of David will always rule as king of Israel. Just as no one can count the stars in the sky nor measure the sand of the seashore, so I will increase the descendants of my servant David and the Levites who minister to me until they cannot be counted.”