See Genesis 14:

Melchizedek Blesses Abram

17 After Abram returned from his victory over Kedorlaomer and all his allies, the king of Sodom went out to meet him in the valley of Shaveh (that is, the King’s Valley).

18 And Melchizedek, the king of Salem and a priest of God Most High, brought Abram some bread and wine. 19 Melchizedek blessed Abram with this blessing:

“Blessed be Abram by God Most High,

Creator of heaven and earth.

20

And blessed be God Most High,

who has defeated your enemies for you.”

Then Abram gave Melchizedek a tenth of all the goods he had recovered.

21 The king of Sodom said to Abram, “Give back my people who were captured. But you may keep for yourself all the goods you have recovered.”

22 Abram replied to the king of Sodom, “I solemnly swear to the Lord, God Most High, Creator of heaven and earth, 23 that I will not take so much as a single thread or sandal thong from what belongs to you. Otherwise you might say, ‘I am the one who made Abram rich.’

A psalm of David.

The Lord said to my Lord,

“Sit in the place of honor at my right hand

until I humble your enemies,

making them a footstool under your feet.”

2

The Lord will extend your powerful kingdom from Jerusalem;

you will rule over your enemies.

3

When you go to war,

your people will serve you willingly.

You are arrayed in holy garments,

and your strength will be renewed each day like the morning dew.

4

The Lord has taken an oath and will not break his vow:

“You are a priest forever in the order of Melchizedek.”

5

The Lord stands at your right hand to protect you.

He will strike down many kings when his anger erupts.

6

He will punish the nations

and fill their lands with corpses;

he will shatter heads over the whole earth.

7

But he himself will be refreshed from brooks along the way.

He will be victorious.