In Gen 14 Abram’s nephew Lot is deported from Sodom, where he lived, due to a battle in which Sodom was involved. Abram undertook a campaign to liberate Lot, his family and possessions, and succeeded. When he returned, Melchizedek, king of Salem, approached him and offered bread and wine. Melchizedek means ‘king of righteousness’. Salem (it means: peace), was later called Jerusalem. Melchizedek was both king and priest.
As a priest he blessed Abram, Abram then gave him one tenth of what he had gained in the battle. In so doing he honoured the priesthood of Melchizedek.
This story from the Old Testament points toward Jesus Christ, the Messiah, who combined being a (High)- Priest, Prophet and King in One Person.
He made the ultimate sacrifice by giving Himself, His blood, for the atonement between God and man.
Bread and wine, consumed at the Lord’s Supper, remind us of this sacrifice.
Isaiah 9 verse 6:
For to us a Child is born,
to us a Son is given; and the government shall be upon His shoulder, and His name shall be be called Wonderful, Counsellor, Mighty God,
Everlasting Father, Prince of Peace.