Exodus 38:15-17

Amplified Bible

¹⁵ and the same for the other side [of the court gate]. Left and right of the court gate there were curtains of fifteen cubits; with their three support poles and their three sockets. ¹⁶ All the curtains around the court were of fine twisted linen. ¹⁷ The sockets for the support poles were made of bronze, the hooks of the support poles and their connecting rings were made of silver; and silver overlaid their tops. All the support poles of the court had silver connecting rings.