פירוש על מלכים א 1:38

And the archers and the sling shooters. [Targum] Yonoson rendered, “the archers and the sling shooters.”³¹Alternatively, כרתי ופלתי refers to the Sanhedrin.—Ralbag But our Rabbis maintained [that it refers to] the Urim and Tumim.³²The Urim and Tumim are called “כרתי ופלתי”; כרתי because their words are “cut” [כרת], i.e., they render irrevocable decisions and פלתי because they are “wondrous” [פלא] in revealing the future. See Maseches Berachos 4a.

So Zadok the priest, and Nathan the prophet, and Benaiah the son of Jehoiada, and the Cherethites and the Pelethites, went down: They were a Sanhedrin, as in ancient times.