Barukh atah Adonai, Elohaynu, melekh ha-olam Blessed are you, Lord, our God, king of the universe

asher keed'shanu b'meetzvotav v'tzeevanu leek'boa mezuzah who has sanctified us with His commandments and commanded us to affix a mezuzah

The mezuzah should then be affixed to the upper third of the doorpost on the right side as one enters the house or room. If the doorpost is wide enough to permit, the mezuzah should be tilted with the upper part slanting inward toward the house or room.