Matthew Henry on Exodus 38

In all ages of the church there have been some persons more devoted to God, more constant in their attendance upon his ordinances, and more willing to part even with lawful things, for his sake, than others. Some women, devoted to God and zealous for the tabernacle worship, expressed zeal by parting with their mirrors, which were polished plates of brass. Before the invention of looking-glasses, these served the same purposes. (Ex 38:9-20)

The walls of the court being of curtains only, intimated that the state of the Jewish church itself was movable and changeable; and in due time to be taken down and folded up, when the place of the tent should be enlarged, and its cords lengthened, to make room for the Gentile world.

The foundation of massy pieces of silver showed the solidity and purity of the truth upon which the church is founded. Let us regard the Lord Jesus Christ while reading of the furniture of the tabernacle. While looking at the altar of burnt-offering, let us see Jesus. In him, his righteousness, and salvation, is a full and sufficient offering for sin. In the laver of regeneration, by his Holy Spirit, let our souls be washed, and they shall be clean; and as the people offered willingly, so may our souls be made willing. Let us be ready to part with any thing, and count all but loss to win Christ.