Mary is the the end of the Old Covenant

“As, then, circumcision began with Abraham, and the Sabbath and sacrifices and offerings and feasts with Moses, and it has been proved they were enjoined on account of the hardness of your people’s heart, so it was necessary, in accordance with the Father’s will, that they should have an end in Him who was born of a virgin, of the family of Abraham and tribe of Judah, and of David…”

Justin Martyr
Dialogue with Trypho
Chapter XLIII

Eucharistic sacrifice prophesied in the Old Testament

“And the offering of fine flour, sirs,” I said, “which was prescribed to be presented on behalf of those purified from leprosy, was a type of the bread of the Eucharist, the celebration of which our Lord Jesus Christ prescribed, in remembrance of the suffering which He endured on behalf of those who are purified in soul from all iniquity, in order that we may at the same time thank God for having created the world, with all things therein, for the sake of man, and for delivering us from the evil in which we were, and for utterly overthrowing principalities and powers by Him who suffered according to His will. Hence God speaks by the mouth of Malachi, one of the twelve [prophets], as I said before, about the sacrifices at that time presented by you: ‘I have no pleasure in you, saith the Lord; and I will not accept your sacrifices at your hands: for, from the rising of the sun unto the going down of the same, My name has been glorified among the Gentiles, and in every place incense is offered to My name, and a pure offering: for My name is great among the Gentiles, saith the Lord: but ye profane it.” [So] He then speaks of those Gentiles, namely us, who in every place offer sacrifices to Him, i.e.,the bread of the Eucharist, and also the cup of the Eucharist, affirming both that we glorify His name, and that you profane [it].

Justin Martyr
Dialogue with Trypho
Chapter XLI

Trypho understands Justin worships Christ as the Yahweh of the Old Testament

And Trypho said, “…For you utter many blasphemies, in that you seek to persuade us that this crucified man was with Moses and Aaron, and spoke to them in the pillar of the cloud; then that he became man, was crucified, and ascended up to heaven, and comes again to earth, and ought to be worshipped.”

Justin Martyr
Dialogue with Trypho
Chapter XXXVIII

The God of Psalm 46 is Christ

“Moreover, in the diapsalm of the forty-sixth Psalm, reference is thus made to Christ: ‘God went up with a shout, the Lord with the sound of a trumpet. Sing ye to our God, sing ye: sing to our King, sing ye; for God is King of all the earth: sing with understanding. God has ruled over the nations. God sits upon His holy throne. The rulers of the nations were assembled along with the God of Abraham, for the strong ones of God are greatly exalted on the earth.’

Justin Martyr
Dialogue with Trypho
Chapter XXVII

Christ is King of Glory

Accordingly, it is shown that Solomon is not the Lord of hosts; but when our Christ rose from the dead and ascended to heaven, the rulers in heaven, under appointment of God, are commanded to open the gates of heaven, that He who is King of glory may enter in, and having ascended, may sit on the right hand of the Father until He make the enemies His footstool, as has been made manifest by another Psalm. For when the rulers of heaven saw Him of uncomely and dishonored appearance, and inglorious, not recognizing Him, they inquired, ‘Who is this King of glory?’ And the Holy Spirit, either from the person of His Father, or from His own person, answers them, ‘The Lord of hosts, He is this King of glory.’

Justin Martyr
Dialogue with Trypho
Chapter XXXVI

Christ — God and Lord of hosts

And I said, “As you wish, Trypho, I shall come to these proofs which you seek in the fitting place; but now you will permit me first to recount the prophecies, which I wish to do in order to prove that Christ is called both God and Lord of hosts, and Jacob, in parable by the Holy Spirit; and your interpreters, as God says, are foolish, since they say that reference is made to Solomon and not to Christ, when he bore the ark of testimony into the temple which he built.

Justin Martyr
Dialogue with Trypho
Chapter XXXVI

Heretics do not worship Christ

For some in one way, others in another, teach to blaspheme the Maker of all things, and Christ, who was foretold by Him as coming, and the God of Abraham, and of Isaac, and of Jacob, with whom we have nothing in common, since we know them to be atheists, impious, unrighteous, and sinful, and confessors of Jesus in name only, instead of worshippers of Him.

Justin Martyr
Dialogue with Trypho
Chapter XXXV

Justin uses Psalm 72 to show Christ is worshipped

Moreover, that Solomon was a renowned and great king, by whom the temple called that at Jerusalem was built, I know; but that none of those things mentioned in the Psalm happened to him, is evident. For neither did all kings worship him; nor did he reign to the ends of the earth; nor did his enemies, falling before him, lick the dust.

Justin Martyr
Dialogue with Trypho
Chapter XXXIV

Christ is King, Priest, God, Lord, Angel and Man

For Christ is King, and Priest, and God, and Lord, and angel, and man, and captain, and stone, and a Son born, and first made subject to suffering, then returning to heaven, and again coming with glory, and He is preached as having the everlasting kingdom: so I prove from all the Scriptures.

…and all the kings of the earth shall worship Him, and all the nations shall serve Him.

Justin Martyr
Dialogue with Trypho
Chapter XXXIV

The prophets are Christ’s

Accordingly, these things have happened to you in fairness and justice, for you have slain the Just One, and His prophets before Him; and now you reject those who hope in Him, and in Him who sent Him—God the Almighty and Maker of all things —cursing in your synagogues those that believe on Christ.

Justin Martyr
Dialogue with Trypho
Chapter XVI