Psalms 110: 1 - 4
1 The LORD says to my lord: "Sit at my right hand, till I make your enemies your footstool."
2 The LORD sends forth from Zion your mighty scepter. Rule in the midst of your foes!
3 Your people will offer themselves freely on the day you lead your host upon the holy mountains. From the womb of the morning like dew your youth will come to you.
4 The LORD has sworn and will not change his mind, "You are a priest for ever after the order of Melchiz'edek."

EWTN