For he has broken the gates of brass and cut the bars of iron asunder.
I will go before thee and make the crooked places straight; I will break in pieces the gates of bronze and cut in sunder the bars of iron:
Thy locks shall be iron and brass; and as thy days, so shall thy strength be.
1 Kings 4:13
the son of Geber, in Ramothgilead; to him pertained the towns of Jair, the son of Manasseh, which were in Gilead; to him also pertained the region of Argob, which is in Bashan, sixty great cities with walls and brasen bars;
1 Chronicles 22:3
Likewise, David prepared iron in abundance for the nails for the doors of the gates, and for the joinings, and brass in abundance without weight,
Go and tell Hananiah, saying, Thus hath the LORD said: Thou hast broken the yokes of wood; but thou shalt make yokes of iron instead.
2 Chronicles 4:9
Furthermore, he made the court of the priests and the great court and doors for the court and overlaid the doors of them with brass.