prepared iron

1 Chronicles 29:2, 7
Now with all my ability I have made provision for the house of my God--gold for the gold articles, silver for the silver, bronze for the bronze, iron for the iron, and wood for the wood, as well as onyx for the settings, turquoise, stones of various colors, all kinds of precious stones, and slabs of marble--all in abundance. . . .

without weight

1 Chronicles 22:14
Now behold, I have taken great pains to provide for the house of the LORD--100, 000 talents of gold, 1, 000, 000 talents of silver, and bronze and iron too great to be weighed. I have also provided timber and stone, but you will need to add to them.

1 Kings 7:47
Solomon left all these articles unweighed, because there were so many. The weight of the bronze could not be determined.

2 Chronicles 4:18
Solomon made all these articles in such great abundance that the weight of the bronze could not be determined.

Jeremiah 52:20
As for the two pillars, the sea, the twelve bronze bulls under it, and the movable stands that King Solomon had made for the house of the LORD, the weight of the bronze from all these articles was beyond measure.