Exodus 38:29-31

The people also brought as special offerings 5,310 pounds of bronze, which was used for casting the bases for the posts at the entrance to the Tabernacle, and for the bronze altar with its bronze grating and all the altar utensils. Bronze was also used to make the bases for the posts that supported the curtains around the courtyard, the bases for the curtain at the entrance of the courtyard, and all the tent pegs for the Tabernacle and the courtyard.