Who was Melchizedek?
Melchizedek was the king of Salem and priest of El Elyon ("God most high") mentioned in the 14th chapter of the Book of Genesis. He brings out bread and wine and blesses Abram and El Elyon.
In Hebrews, Jesus is identified as "a priest forever in the order of Melchizedek", and so Jesus assumes the role of High Priest once and for all.
The name of Melchizedek appears only in these biblical verses:
Genesis 14:18-20; Psalm 110:4; Hebrews 5:6; 5:10; 6:19-20; 7:1-4;7:9-11; 7:15-17; 7:21.
He had no beginning or end, and as Abraham paid tithes to Melchizedek, He is considered to be an appearance of Jesus, prior to his birth to Mary.
56 Your father Abraham rejoiced to see my day: and he saw it, and was glad.
57 Then said the Jews unto him, Thou art not yet fifty years old, and hast thou seen Abraham?
58 Jesus said unto them, Verily, verily, I say unto you, Before Abraham was, I am.
14 Seeing then that we have a great high priest, that is passed into the heavens, Jesus the Son of God, let us hold fast our profession.
15 For we have not an high priest which cannot be touched with the feeling of our infirmities; but was in all points tempted like as we are, yet without sin.
16 Let us therefore come boldly unto the throne of grace, that we may obtain mercy, and find grace to help in time of need.