Exodus 36:22

One board had two tenons, equally distant one from another: thus did he make for all the boards of the tabernacle.

The building of the tabernacle followed a prescribed design down to the framing of its walls. Each board was fashioned with two tenons set at equal distance from one another. The uniformity and precision of that detail displayed the exactness and skill belonging to work done for God. Such careful workmanship shows that perfection is required in every line of service rendered to Him.