וַאֲבָֽרֲכָה֙ מְבָ֣רְכֶ֔יךָ וּמְקַלֶּלְךָ֖ אָאֹ֑ר וְנִבְרְכ֣וּ בְךָ֔ כֹּ֖ל מִשְׁפְּחֹ֥ת הָאֲדָמָֽה׃
Je bénirai ceux qui te béniront, et qui t’outragera je le maudirai; et par toi seront heureuses toutes les races de la terre."
Mishneh Torah, Prayer and the Priestly Blessing
The priest who does not go up to the platform to bless the people, although he has neglected to fulfill one affirmative precept, is accounted as having transgressed three affirmative precepts, for it is said, "On this wise ye shall bless the children of Israel"; "Ye shall say unto them"; "So shall they put my name" (Numbers 6:22-27). Any priest who does not bless the people is not blessed. Every priest who blesses them is blessed, for it is said, "I will bless them that bless thee" (Genesis 12:3). Blessed be the All-Merciful who hath helped us.