They donated for the service of God's temple 5,000 talents and ten thousand darics of gold, 10,000 talents of silver, 18,000 talents of bronze, and 100,000 talents of iron. Verse Concepts

Nail » Made of iron

1 Chronicles 22:3

David supplied a large amount of iron for the nails of the doors of the gates and for braces, more bronze than could be weighed, Verse Concepts

The First Temple » David » Made preparations for building

1 Chronicles 29:2-5

So I have made every effort to provide what is needed for the temple of my God, including the gold, silver, bronze, iron, wood, as well as a large amount of onyx, settings of antimony and other stones, all kinds of precious stones, and alabaster. Now, to show my commitment to the temple of my God, I donate my personal treasure of gold and silver to the temple of my God, in addition to all that I have already supplied for this holy temple. This includes 3,000 talents of gold from Ophir and 7,000 talents of refined silver for overlaying the walls of the buildings, read more.
for gold and silver items, and for all the work of the craftsmen. Who else wants to contribute to the Lord today?"

1 Chronicles 22:2-5

David ordered the resident foreigners in the land of Israel to be called together. He appointed some of them to be stonecutters to chisel stones for the building of God's temple. David supplied a large amount of iron for the nails of the doors of the gates and for braces, more bronze than could be weighed, and more cedar logs than could be counted. (The Sidonians and Tyrians had brought a large amount of cedar logs to David.) read more.
David said, "My son Solomon is just an inexperienced young man, and the temple to be built for the Lord must be especially magnificent so it will become famous and be considered splendid by all the nations. Therefore I will make preparations for its construction." So David made extensive preparations before he died.

1 Chronicles 22:14-16

Now, look, I have made every effort to supply what is needed to build the Lord's temple. I have stored up 100,000 talents of gold, 1,000,000 talents of silver, and so much bronze and iron it cannot be weighed, as well as wood and stones. Feel free to add more! You also have available many workers, including stonecutters, masons, carpenters, and an innumerable array of workers who are skilled in using gold, silver, bronze, and iron. Get up and begin the work! May the Lord be with you!"