כה תברכו את בני ישראל אמור להם
The Kohen who blesses the people has an “approved text” to which he must adhere verbatim. There is no room for the Kohen to supplement the prescribed text stated in the Torah. The Kohen who adds blessing transgresses the prohibition of Es kol hadavar asher Anochi metzaveh eschem oso tishmoru laasos, lo soseif alav v’lo sigra mimenu, “The entire word that I command you, that you shall observe to do; you shall not add to it, and you shall not subtract from it” (Devarim 13:1). In his commentary to the pasuk, Rashi cites examples of Bal Tosif, do not add:…