ISB ~ 2 Corinthians 3 v7

Moses’ face:A reference to Ex 34:29-35, where the glory of God shone from the face of Moses and frightened the Israelites.

Most scholars understand Paul this way:Moses veiled himself to prevent Israel from seeing the radiance of his face fade away over time. The gradual disappearance of this brightness, hidden behind the veil, symbolizes the destiny of the Old Covenant, which will itself pass away (2 Cor 3:13).