17 with two projections set parallel to each other. Make all the frames of the tabernacle in this way.
17 There shall be two tenons in each frame, for fitting together. So shall you do for all the frames of the tabernacle.
17 with two pegs for securing them. Make all the frames identical:
17 Two tenons shall be in each board for binding one to another. Thus you shall make for all the boards of the tabernacle.
17 with two pegs under each frame. Make all the frames identical.
Matthew Henry's Commentary on Exodus 26:17
Commentary on Exodus 26:15-30
(Read Exodus 26:15-30)
The sockets of silver each weighed about 115 pounds; they were placed in rows on the ground. In every pair of these sockets, a strong board of shittim-wood, covered with plates of gold, was fitted by mortises and tenons. Thus walls were formed for the two sides, and for the west end. The wall was further held together by bars, which passed through rings of gold. Over this the curtains were spread. Though movable, it was strong and firm. The materials were very costly. In all this it was a type of the church of God, built upon the foundation of the apostles and prophets, Jesus Christ himself being the chief Corner-stone, Ephesians 2:20,21.