Exodus 26:19

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;

Exodus 26:23

26:23 You are to make two frames for the corners of the tabernacle on the back.

Exodus 36:24

36:24 He made forty silver bases 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,

Exodus 36:28

36:28 He made two frames for the corners of the tabernacle on the back.