The Father confesses the Son’s name to be his own and incense is offered up to him

He took that created thing, bread, and gave thanks, and said, “This is My body.” And the cup likewise, which is part of that creation to which we belong, He confessed to be His blood, and taught the new oblation of the new covenant; which the Church receiving from the apostles, offers to God throughout all the world, to Him who gives us as the means of subsistence the first-fruits of His own gifts in the New Testament, concerning which Malachi, among the twelve prophets, thus spoke beforehand: “I have no pleasure in you, saith the Lord Omnipotent, and I will not accept sacrifice at your hands. For from the rising of the sun, unto the going down [of the same], My name is glorified among the Gentiles, and in every place incense is offered to My name, and a pure sacrifice; for great is My name among the Gentiles, saith the Lord Omnipotent;”—indicating in the plainest manner, by these words, that the former people [the Jews] shall indeed cease to make offerings to God, but that in every place sacrifice shall be offered to Him, and that a pure one; and His name is glorified among the Gentiles. But what other name is there which is glorified among the Gentiles than that of our Lord, by whom the Father is glorified, and man also? And because it is [the name] of His own Son, who was made man by Him, He calls it His own.

…so also does the Father confess the name of Jesus Christ, which is throughout all the world glorified in the Church, to be His own, both because it is that of His Son, and because He who thus describes it gave Him for the salvation of men. Since, therefore, the name of the Son belongs to the Father, and since in the omnipotent God the Church makes offerings through Jesus Christ, He says well on both these grounds, “And in every place incense is offered to My name, and a pure sacrifice.” Now John, in the Apocalypse, declares that the “incense” is “the prayers of the saints.”

Irenaeus of Lyons
Against Heresies, Book IV
Chapter XVII

 

One God of both Testaments

For the precepts of an absolutely perfect life, since they are the same in each Testament, have pointed out [to us] the same God, who certainly has promulgated particular laws adapted for each; but the more prominent and the greatest [commandments], without which salvation cannot [be attained], He has exhorted [us to observe] the same in both.

Irenaeus of Lyons
Against Heresies, Book IV
Chapter XII

Christ was very man and very God

He, therefore, who was known, was not a different being from Him who declared “No man knoweth the Father,” but one and the same, the Father making all things subject to Him; while He received testimony from all that He was very man, and that He was very God, from the Father, from the Spirit, from angels, from the creation itself, from men, from apostate spirits and demons, from the enemy, and last of all, from death itself. But the Son, administering all things for the Father, works from the beginning even to the end, and without Him no man can attain the knowledge of God. For the Son is the knowledge of the Father; but the knowledge of the Son is in the Father, and has been revealed through the Son;

Irenaeus of Lyons
Against Heresies, Book IV
Chapter VI

Christ spoke through the prophets and they named Him God

But by the law and the prophets did the Word preach both Himself and the Father alike [to all]; and all the people heard Him alike, but all did not alike believe. And through the Word Himself who had been made visible and palpable, was the Father shown forth, although all did not equally believe in Him; but all saw the Father in the Son: for the Father is the invisible of the Son, but the Son the visible of the Father. And for this reason all spake with Christ when He was present [upon earth], and they named Him God.

Irenaeus of Lyons
Against Heresies, Book IV
Chapter VI

The Father and the Word are Creator

For by means of the creation itself, the Word reveals God the Creator; and by means of the world [does He declare] the Lord the Maker of the world; and by means of the formation [of man] the Artificer who formed him; and by the Son that Father who begat the Son: and these things do indeed address all men in the same manner, but all do not in the same way believe them.

Irenaeus of Lyons
Against Heresies, Book IV
Chapter VI

The Father made His Word visible

And for this purpose did the Father reveal the Son, that through His instrumentality He might be manifested to all, and might receive those righteous ones who believe in Him into incorruption and everlasting enjoyment (now, to believe in Him is to do His will); but He shall righteously shut out into the darkness which they have chosen for themselves, those who do not believe, and who do consequently avoid His light. The Father therefore has revealed Himself to all, by making His Word visible to all; and, conversely, the Word has declared to all the Father and the Son, since He has become visible to all. And therefore the righteous judgment of God [shall fall] upon all who, like others, have seen, but have not, like others, believed.

Irenaeus of Lyons
Against Heresies, Book IV
Chapter VI

Irenaeus quotes Justin Martyr against Marcion

In his book against Marcion, Justin does well say: “I would not have believed the Lord Himself, if He had announced any other than He who is our framer, maker, and nourisher. But because the only-begotten Son came to us from the one God, who both made this world and formed us, and contains and administers all things, summing up His own handiwork in Himself, my faith towards Him is stedfast, and my love to the Father immoveable, God bestowing both upon us.”

Irenaeus of Lyons
Against Heresies, Book IV
Chapter VI

Faith towards God justifies a man

The Lord, therefore, was not unknown to Abraham, whose day he desired to see; nor, again, was the Lord’s Father, for he had learned from the Word of the Lord, and believed Him; wherefore it was accounted to him by the Lord for righteousness. For faith towards God justifies a man;

Irenaeus of Lyons
Against Heresies, Book IV
Chapter V