From the Gospel reading today for the Feast of St. Fabian and St. Sebastian:
Continuation of the Holy Gospel according to Luke
R. Glory be to Thee, O Lord.
At that time, Jesus coming down from the mountain, took His stand on a level stretch, with a crowd of His disciples, and a great multitude of people from all Judea and Jerusalem, and the sea coast of Tyre and Sidon, who came to listen to Him and to be healed of their diseases. And those who were troubled with unclean spirits were cured. And all the crowd were trying to touch Him, for power went forth from Him and healed all. And He lifted up His eyes to His disciples, and said, Blessed are you poor, for yours is the kingdom of God. Blessed are you who hunger now, for you shall be satisfied. Blessed are you who weep now, for you shall laugh. Blessed shall you be when men hate you, and when they shut you out, and reproach you, and reject your name as evil, because of the Son of Man. Rejoice on that day and exult, for behold your reward is great in heaven.
R. Praise be to Thee, O Christ.
S. By the words of the Gospel may our sins be blotted out.
UPDATE: It is interesting that one of the ministers who prayed at the Inauguration also read the Beatitudes, from Matthew 5.