Psalm 110:1-4 and Genesis 14:18-20

Psalm 110:1-4
1 A Psalm of David. The Lord said to my Lord, "Sit at my right hand, until I make your enemies your footstool."
2 The Lord will send forth the scepter of your virtue from Zion. Rule in the midst of your enemies.
3 It is with you from the beginning, in the day of your virtue, in the splendor of the saints. From conception, before the light-bearer, I begot you.
4 The Lord has sworn, and he will not repent: "You are a priest forever, according to the order of Melchizedek."
Genesis 14:18-20
18 Then in truth, Melchizedek, the king of Salem, brought forth bread and wine, for he was a priest of the Most High God;
19 he blessed him, and he said: "Blessed be Abram by the Most High God, who created heaven and earth.
20 And blessed be the Most High God, through whose protection the enemies are in your hands." And he gave him tithes from everything.