Exodus 38:10-12

10their twenty pillars, and their twenty bases, were made of bronze; the hooks of the pillars and their 1bands were of silver.

11For the north side there were a hundred cubits; their twenty pillars and their twenty bases were of bronze, the hooks of the pillars and their 2bands were of silver.

12For the west side there were hangings of fifty cubits with their ten pillars and their ten bases; the hooks of the pillars and their 3bands were of silver.