And he made loops of blue on the edge of one curtain from the selvedge in the coupling: likewise he made in the uttermost side of another curtain, in the coupling of the second.

King James Translators' Notes

selvedge: an edge of cloth so woven that it cannot unravel

Matthew Henry's Concise Commentary

36:1-38 The making of the tabernacle The liberality of the people restrained. - The readiness and zeal with which these builders set about their work, the exactness with which they performed it, and the faithfulness with which they objected to receive more contributions, are worthy of our imitation. Thus should we serve God, and our superiors also, in all things lawful. Thus should all who are in public trusts abhor filthy lucre, and avoid all occasions and temptations to covetousness. Where have we the representation of God's love towards us, that we by love dwell in him and he in us, save in Emmanuel? Mt 1:23. This is the sum of the ministry of reconciliation, 2Co 5:18,19. This was the design of the tabernacle of witness, a visible testimony of the love of God to the race of men, however they were fallen from their first state. And this love was shown by Christ's taking up his abode on earth; by the Word being made flesh, Joh 1:14, wherein, as the original expresses it, he did tabernacle among us.

Matthew Henry's Whole Bible Commentary

Verses 8-13

The first work they set about was the framing of the house, which must be done before the furniture of it was prepared. This house was not made of timber or stone, but of curtains curiously embroidered and coupled together. This served to typify the state of the church in this world, the palace of God's kingdom among men. 1. Though it is upon the earth, yet its foundation is not in the earth, as that of a house is; no, Christ's kingdom is not of this world, nor founded in it. 2. It is mean and mutable, and in a militant state; shepherds dwelt in tents, and God is the Shepherd of Israel; soldiers dwelt in tents, and the Lord is a man of war, and his church marches through an enemy's country, and must fight its way. The kings of the earth enclose themselves in cedar (Jer. 22:15), but the ark of God was lodged in curtains only. 3. Yet there is a beauty in holiness; the curtains were embroidered, so is the church adorned with the gifts and graces of the Spirit, that raiment of needle-work, Ps. 45:14. 4. The several societies of believers are united in one, and, as here, all become one tabernacle; for there is one Lord, one faith, and one baptism.