Jeremiah 33:18-22

and the Levitical priests shall never lack a man (descendant) to offer burnt offerings before Me and to burn grain offerings and to prepare sacrifices all day long.’ ” The word of the LORD came to Jeremiah, saying, “Thus says the LORD, ‘If you can break My covenant for the day and My covenant for the night, so that day and night do not take place at their appointed times, then My covenant may also be broken with David My servant so that he will not have a son to reign on his throne, and [My covenant may also be broken] with the Levitical priests, My ministers. As the host of [the stars of] heaven cannot be counted and the sand of the sea cannot be measured, so I will multiply the descendants of David My servant and the Levites who minister to Me.’ ”