Melchizedek in the Bible

Genesis 14:18-20 And Melchizedek king of Salem brought forth bread and wine: and he was the priest of the most high God. 19 And he blessed him, and said, Blessed be Abram of the most high God, possessor of heaven and earth: 20 And blessed be the most high God, which hath delivered thine enemies into thy hand. And he gave him tithes of all.
Psalm 110:4 The LORD hath sworn, and will not repent, Thou art a priest for ever after the order of Melchizedek.

Hebrews 5:6 As he saith also in another place, Thou art a priest for ever after the order of Melchisedec.
Hebrews 5:10 Called of God an high priest after the order of Melchisedec.
Hebrews 6:20 Whither the forerunner is for us entered, even Jesus, made an high priest for ever after the order of Melchisedec.
Hebrews 7:1-21 For this Melchisedec, king of Salem, priest of the most high God, who met Abraham returning from the slaughter of the kings, and blessed him; 2 To whom also Abraham gave a tenth part of all; first being by interpretation King of righteousness, and after that also King of Salem, which is, King of peace; 3 Without father, without mother, without descent, having neither beginning of days, nor end of life; but made like unto the Son of God; abideth a priest continually. 4 Now consider how great this man was, unto whom even the patriarch Abraham gave the tenth of the spoils. ...