Deuteronomy 17:9

הכהנים הלוים [AND THOU SHALT COME UNTO] THE PRIESTS THE LEVITES — i.e. unto the priests, who descend from of the tribe of Levi. ואל השפט אשר יהיה בימים ההם [AND THOU SHALT COME UNTO THE PRIESTS …] AND UNTO THE JUDGE THAT SHALL BE IN THOSE DAYS — The last apparently redundant words suggest: and even though he is not as eminent as other judges that have been before him, you must obey him — you have none else but the judge that lives in your days (i.e. you are only concerned with him) (Rosh Hashanah 25b).

וּבָאתָ֗ אֶל־הַכֹּהֲנִים֙ הַלְוִיִּ֔ם וְאֶ֨ל־הַשֹּׁפֵ֔ט אֲשֶׁ֥ר יִהְיֶ֖ה בַּיָּמִ֣ים הָהֵ֑ם וְדָרַשְׁתָּ֙ וְהִגִּ֣ידוּ לְךָ֔ אֵ֖ת דְּבַ֥ר הַמִּשְׁפָּֽט׃

and thou shalt come to the priests the Levites, and to the judge that shall be in those days, and inquire; and they shall tell thee the sentence of judgment: