Exodus 28:41

והלבשת אתם את אהרן AND THOU SHALT PUT THEM ON AARON — i. e. those which are mentioned in connection with Aaron: the breast-plate, the ephod, the Robe, the inner garment of checker-work, the mitre, the girdle and the Plate, and the breeches which are prescribed later for all of them (for all the priest’s and therefore for Aaron also). ואת בניו אתו [AND THOU SHALT PUT THEM ON AARON …] AND ON HIS SONS WITH HIM — i. e. put on them those garments which are prescribed for them. ומשחת אתם AND THOU SHALT ANOINT THEM — viz., Aaron and his sons, with the oil of anointing. ומלאת את ידם AND THOU SHALT CONSECRATE THEM (more lit., fill their hand) — wherever the term “filling the hand” is used it denotes the installation ceremony performed when one enters for the first time into an office, as a sign that he is entitled to it from that day and henceforth. And in the old French language — when a person is appointed to the charge of a matter, the Prince puts into his hand a leathern glove which they call “gant” in old French and by that means he gives him a right to the matter, and they term that transmission of the glove and the office, revestir in old French This is the connection between the literal and the metaphorical meaning of “filling the hand”.

וְהִלְבַּשְׁתָּ֤ אֹתָם֙ אֶת־אַהֲרֹ֣ן אָחִ֔יךָ וְאֶת־בָּנָ֖יו אִתּ֑וֹ וּמָשַׁחְתָּ֨ אֹתָ֜ם וּמִלֵּאתָ֧ אֶת־יָדָ֛ם וְקִדַּשְׁתָּ֥ אֹתָ֖ם וְכִהֲנ֥וּ לִֽי׃

And thou shalt put them upon Aharon thy brother, and his sons with him; and shalt anoint them, and consecrate them, and sanctify them, that they may minister to me in the priest’s office.