1 Corinthians 11:3 establishes the headship order that explains why man is God's glory — as head of woman.

Genesis 1:26 is the creation account where God makes mankind in His image — Paul draws on this to ground his argument that man is the image and glory of God.

Genesis 1:27 affirms that both male and female are created in God's image, while Paul here specifically identifies man as the image and glory of God, setting up his argument.