Genesis 14:19

19 and he blesseth him, and saith, `Blessed [is] Abram to God Most High, possessing heaven and earth;

Genesis 14:19 Meaning and Commentary

Genesis 14:19

And he blessed him
Melchizedek blessed Abram, which was one part of his office as a priest, to wish and pray for a blessing on others, see ( Numbers 6:23 ) and herein typified Christ, who really blesses or confers blessings on all his people, even spiritual blessings, such as redemption, remission of sins, and justifying righteousness, adoption, and eternal life: and said, blessed [be] Abram of the most high God;
that is, may he be blessed by him who is the most high God, with all kind of blessings, both temporal and spiritual; or he declares him to be blessed of him, as he undoubtedly was, or foretells that he would be, as was certainly his case: and another epithet of God is added, which abundantly shows he was able to bless him, since he is the possessor of heaven and earth;
is the Maker of both, and has a right to dispose of all things in them, both heavenly and earthly.

Genesis 14:19 In-Context

17 And the king of Sodom goeth out to meet him (after his turning back from the smiting of Chedorlaomer, and of the kings who [are] with him), unto the valley of Shaveh, which [is] the king's valley.
18 And Melchizedek king of Salem hath brought out bread and wine, and he [is] priest of God Most High;
19 and he blesseth him, and saith, `Blessed [is] Abram to God Most High, possessing heaven and earth;
20 and blessed [is] God Most High, who hath delivered thine adversaries into thy hand;' and he giveth to him a tenth of all.
21 And the king of Sodom saith unto Abram, `Give to me the persons, and the substance take to thyself,'
Young's Literal Translation is in the public domain.