Exodus 38:17, 21

Each post had a bronze base, and all the hooks and rings were silver. The tops of the posts of the courtyard were overlaid with silver, and the rings to hold up the curtains were made of silver.

This is an inventory of the materials used in building the Tabernacle of the Covenant. The Levites compiled the figures, as Moses directed, and Ithamar son of Aaron the priest served as recorder.