Exodus 36:15

The length of one curtain was thirty cubits, and four cubits was the breadth of one curtain: the eleven curtains were of one size.

The verse belongs to the account of building the earthly tabernacle. It records that the curtains were made to exact measurements. All eleven were of one size, thirty cubits long and four cubits wide. This exactness shows that work done for God's service requires exactitude, skill, and perfection.