Exodus 26:18-21

18Make the supports for the tabernacle as follows: twenty supports for the south side,

19and make forty silver bases under the twenty supports, two bases under the first support for its two tenons, and two bases under the next support for its two tenons;

20twenty supports for the second side of the tabernacle, the north side,

21along with their forty silver bases, two bases under the first support and two bases under each support;