Exodus 26:22-25

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.