Exodus 36:23-25

American Standard Version

²³ And he made the boards for the tabernacle: twenty boards for the south side southward; ²⁴ and he made forty sockets of silver under the twenty boards; two sockets under one board for its two tenons, and two sockets under another board for its two tenons. ²⁵ And for the second side of the tabernacle, on the north side, he made twenty boards,