Contradiction with Romans 3:23
This verse mentions that all have sinned and fall short of the glory of God, which contradicts Song of Solomon 4:7 saying "Thou art all fair, my love; there is no spot in thee."
Romans 3:23: For all have sinned, and come short of the glory of God;
Contradiction with Ecclesiastes 7:20
This verse states that there is not a just man upon earth who does good and sins not, contradicting Song of Solomon 4:7's idea of perfection without blemish.
Ecclesiastes 7:20: For [there is] not a just man upon earth, that doeth good, and sinneth not.