There are other significant hints about the Trinity in the Old Testament. It is also in the creation account that we first encounter the Spirit of God (Gen. 1:2).
Then the Lord God said, “See, the man has become like one of us, knowing good and evil; and now, he might reach out his hand and take also from the tree of life, and eat, and live forever”—
Genesis 3:22 NRSV
https://bible.com/bible/2016/gen.3.22.NRSV
