Exodus 26:18-20

New King James Version

¹⁸ And you shall make the boards for the tabernacle, twenty boards for the south side. ¹⁹ You shall make forty sockets of silver under the twenty boards: two sockets under each of the boards for its two tenons. ²⁰ And for the second side of the tabernacle, the north side, there shall be twenty boards