I am the LORD: that is my name: and my glory will I not give to another, neither my praise to graven images.
God turns from addressing Messiah to the people.
I (am) the Lord - Yahweh (H3068); God's distinguishing and incommunicable name, indicating essential being and immutable faithfulness (cf. Exodus 6:3; Psalms 83:18; Psalms 96:5; Hosea 12:5).
My glory - that is, the glory due to me, and to me alone.