8 Now here I wish you to make safe what I am going to say, because of the Jews. For our object is to prove that the Lord Jesus Christ was with the Father. The Lord then says to Moses, I will pass by before you with My glory, and will proclaim the name of the Lord before you. Being Himself the Lord, what Lord does He proclaim? You see how He was covertly teaching the godly doctrine of the Father and the Son. And again, in what follows it is written word for word: And the Lord descended in the cloud, and stood with him there, and proclaimed the name of the Lord. And the Lord passed by before him, and proclaimed, The Lord, the Lord God, merciful and gracious, long-suffering, and abundant in goodness and truth, both keeping righteousness and showing mercy unto thousands, taking away iniquities, and transgressions, and sins. Then in what follows, Moses bowed his head and worshipped before the Lord who proclaimed the Father, and said: Go then, O Lord, in the midst of us.
Source: Catechetical Lectures (New Advent)