Some of the other Holy Bible content that concurs with Psalm 45:1-6 includes:

Hebrews 1:9 - GOD's fairness is better than the standard of 'fair' of mankind - Psalm 45:2,7 -.

Luke 4:22 - GOD's lips speak grace - Psalm 45:2 -.

Psalm 68:33 - GOD rides in majesty of heaven - Psalm 45:4 -.

Hebrews 4:12 - GOD's word hits target (brings repentance) in the hearts of enemies of Christ Jesus - Psalm 45:5 -.