הלכה אויף שמות 28:37

How was the rite of the Priestly Benediction performed in the Temple? The priests went up to the platform after the conclusion of the morning sacrifice. They raised their hands, with fingers straightened, above their heads; except the High Priest who did not raise his hands higher than the Golden Plate.^*on his forehead; the plate had the words engraved, “holy to God”. One prompted them, word for word, just as is done outside the temple, till they had concluded the three verses of the Benediction. The people did not respond "Amen" after each verse. But all the three verses were recited as one blessing. When they concluded, all the people responded, "Blessed be the Lord God, the God of Israel, from everlasting to everlasting."