Exodus 26:18-25
26:18 So you are to make the frames for the tabernacle: twenty frames for the south side,
26:19 and you are to make forty silver bases to go under the twenty frames – two bases under the first frame for its two projections, and likewise two bases under the next frame for its two projections;
26:20 and for the second side of the tabernacle, the north side, twenty frames,
26:21 and their forty silver bases, two bases under the first frame, and two bases under the next frame.
26:22 And for the back of the tabernacle on the west you will make six frames.
26:23 You are to make two frames for the corners of the tabernacle on the back.
26:24 At the two corners they must be doubled at the lower end and finished together at the top in one ring. So it will be for both.
26:25 So there are to be eight frames and their silver bases, sixteen bases, two bases under the first frame, and two bases under the next frame.