2 Chronicles 12:9-11

2 Chronicles 12:9-11. He carried away also the shields of gold which Solomon had made.Instead of which king Rehoboam, made shields of brass, and committed them, to of the hands of the chief of the guard, that kept the entrance of the king’s house. And when the king entered into the house of the LORD, the guard came and fetched them, and brought them again into the guard chamber.

That was a come-down indeed, from shield’s of gold to shields of copper; that is, I suppose, what is meant here by the brass. This is what the king suffered at the hands of Shishak; and it was an emblem of the condition of his people. The golden kingdom had became a brazen one.