בך יברך ישראל. הַבָּא לְבָרֵךְ אֶת בָּנָיו יְבָרְכֵם בְּבִרְכָתָם וְיֹאמַר אִישׁ לִבְנוֹ יְשִׂימְךָ אֱלֹהִים כְּאֶפְרַיִם וְכִמְנַשֶּׁה:
בך יברך ישראל IN THEE SHALL ISRAEL BLESS — When one wishes to bless his sons he will bless them by reciting the formula with which they were blessed — a man will say to his son, “God make thee as Ephraim and as Manasseh.”
וישם את אפרים. בְּבִרְכָתוֹ לִפְנֵי מְנַשֶּׁה, לְהַקְדִּימוֹ בִּדְגָלִים וּבַחֲנֻכַּת הַנְּשִׂיאִים:
וישם את אפרים AND HE PUT EPHRAIM etc. — i.e. in the blessing he bestowed upon them he put Ephraim’s name before that of Manasseh, so giving him precedence over his brother when the Israelites encamped and marched beneath their banners in the wilderness (cf. Numbers 2:18 and Numbers 10:22), and when at the dedication of the altar by the princes of the tribes each brought his gifts (cf. Numbers 7:48 Numbers 7:54). (see Genesis Rabbah 97:5).