LXX Num 7:11

καὶ εἶπεν κύριος πρὸς Μωυσῆν Ἄρχων εἷς καθ’ ἡμέραν, ἄρχων καθ’ ἡμέραν, προσοίσουσιν τὰ δῶρα αὐτῶν εἰς τὸν ἐγκαινισμὸν τοῦ θυσιαστηρίου.

And the LORD said to Moses, “Each day one leader is to present his offering for the dedication of the altar.”