וַיָּבֹ֨א מֹשֶׁ֤ה וְאַהֲרֹן֙ אֶל־אֹ֣הֶל מוֹעֵ֔ד וַיֵּ֣צְא֔וּ וַֽיְבָרֲכ֖וּ אֶת־הָעָ֑ם וַיֵּרָ֥א כְבוֹד־יְהוָ֖ה אֶל־כָּל־הָעָֽם׃
Moïse et Aaron entrèrent dans la Tente d’assignation; ils ressortirent et bénirent le peuple, et la gloire du Seigneur se manifesta au peuple entier.
Mishneh Torah, Prayer and the Priestly Blessing
The Priestly Benediction, wherever it is recited, must be recited only in Hebrew, as it is said, "Thus shall ye bless the Children of Israel." A tradition dating back to Moses is the authority for the following exposition: "Thus shall ye bless", that means, standing. "Thus shall ye bless", that means, with hands raised. "Thus shall ye bless", that means, in the Holy Tongue. "Thus shall ye bless" that means, face to face with the congregation. "Thus shall ye bless", that means uttering the Proper Name of God. This however is uttered thus, only when the Benediction is pronounced in the Temple, as already stated.