Most Relevant Verses
When they were at the large stone which is in Gibeon, Amasa came to meet them. Now Joab was dressed in his military attire, and over it was a belt with a sword in its sheath fastened at his waist; and as he went forward, it fell out.
More Verses on Breastplates
Now a certain man drew his bow at random and struck the king of Israel in a joint of the armor. So he said to the driver of his chariot, "Turn around and take me out of the fight; for I am severely wounded."
He put on righteousness like a breastplate, And a helmet of salvation on His head; And He put on garments of vengeance for clothing And wrapped Himself with zeal as a mantle.
But since we are of the day, let us be sober, having put on the breastplate of faith and love, and as a helmet, the hope of salvation.