John Gills Exposition of the Bible Commentary - Exodus 26:19
And thou shall make forty sockets of silver under the twenty boards ,.... Or bases F19 אדני "bases", V. L. Pagninus, Montanus, Tigurine version, Piscator, Drusius. , and which were properly the foundation of the tabernacle, on which it was settled and established; these sockets were the mortises for the two tenons of each board or plank to be placed in, and were as broad as the plank, and, joining each other, made one entire basis for the whole structure; each socket contained a... read more
Matthew Henry's Complete Commentary - Exodus 26:15-30
Very particular directions are here given about the boards of the tabernacle, which were to bear up the curtains, as the stakes of a tent which had need to be strong, Isa. 54:2. These boards had tenons which fell into the mortises that were made for them in silver bases. God took care to have every thing strong, as well as fine, in his tabernacle. Curtains without boards would have been shaken by every wind; but it is a good thing to have the heart established with grace, which is as the... read more