Halakhah sobre Números 6:23

This is the protocol of Birkat Kohanim: The ḥazan or the gabbai declares “kohanim,” but if only one kohen goes up before the ark, “kohanim” is not declared. This is derived from the verse “Say to them” (Bamidbar 6:23), which is in the plural and indicates that the word “kohanim” is only declared when there are at least two kohanim present (SA 128:10). Birkat Kohanim is not recited by the kohanim on their own. Rather, the ḥazan recites each word and the kohanim repeat after him. At the completion of each verse, the congregation answers “amen.”

When the kohanim perform Birkat Kohanim, the congregation must stand in front of them, as it is written: “This is how you shall bless the Israelites. Say to them” (Bamidbar 6:23). The Sages interpret this to mean that Birkat Kohanim must be performed in the same way that people talk to their friends – by standing face to face and speaking aloud so that all those receiving the blessing can hear them.

The commandment of the priestly blessing every day: That the priests were commanded that they should bless Israel every day, as it is stated (Numbers 6:23), "Thus shall you bless the Children of Israel; say to them."