TT #163 · Parashas Shoftim · Third Aliyah · Passuk 18:05
For the Eternal your God has chosen him from all your tribes to stand and serve in the name of the Eternal, he and his sons, all the days.
Torah Temimah points to Sifrei Devarim 167 / related.
TT lemma: מִכׇּל שְׁבָטֶיךָ.
Sefaria — Sifrei Devarim 167 / related
English: ‘From all your tribes’ – from among all the tribes He chose the tribe of Levi.
Derash on the exclusivity of the choice (Sifrei) — the language emphasizes selection from the whole people.
Hashem chose the tribe of Levi from among all the tribes of Yisrael for the service of the Mikdash.