Jeremiah 33:18-20

Young's Literal Translation

¹⁸ And to the priests -- the Levites, Not cut off from before Me is one, Causing a burnt-offering to ascend, And perfuming a present, and making sacrifice -- all the days.'

¹⁹ And there is a word of Jehovah unto Jeremiah, saying,

²⁰ `Thus said Jehovah: If ye do break My covenant of the day, And My covenant of the night, So that they are not daily and nightly in their season,