Shield

Psalms 3:3 - But thou, O LORD, art a shield for me; my glory, and the lifter up of mine head.
Psalms 28:7 - The LORD is my strength and my shield; my heart trusted in him, and I am helped: therefore my heart greatly rejoiceth; and with my song will I praise him.
Romans 13:4 - For he is the minister of God to thee for good. But if thou do that which is evil, be afraid; for he beareth not the sword in vain: for he is the minister of God, a revenger to execute wrath upon him that doeth evil.