Numbers 1:4

וְאִתְּכֶ֣ם יִהְי֔וּ אִ֥ישׁ אִ֖ישׁ לַמַּטֶּ֑ה אִ֛ישׁ רֹ֥אשׁ לְבֵית־אֲבֹתָ֖יו הֽוּא׃

καὶ μεθ’ ὑμῶν ἔσονται ἕκαστος κατὰ φυλὴν ἑκάστου ἀρχόντων· καὶ κατ’ οἴκους πατριῶν ἔσονται.

Greek text from Swete's edition, CC BY-SA 4.0

Y estará con vosotros un varón de cada tribu, cada uno cabeza de la casa de sus padres.

And one man from each tribe, the head of each family, must be there with you. The Leaders of the Tribes