"And thou shalt write them upon the door posts of thy house and upon thy gates."
(Deuteronomy 6:4-9, Deuteronomy 11:13-21)

Blessing for Hanging a Mezuzah

ברוך אתה ײ אלהינו מלך העולם אשר קדשנו במצותיו וצונו לקבוע מזוזה

Baruch atah Adonai, Elohaynu, melech ha-olam asher keed'shanu b'meetzvotav v'tzeevanu leek'boa mezuzah.

Blessed are you, Lord, our God, king of the universe who has sanctified us with His commandments and commanded us to affix a mezuzah.