Here it is mentioned as a special feature that women gave the material for the laver in the form of their mirrors. The mirror, which they use to look at themselves and which caresses their pride, is handed in to make it the laver. It has cost them something to give up this important tool. Someone would only do that if she would get something better in return. And this is the case here.
The laver represents the Word of God. This is also compared with a mirror (Jam 1:23-2523For if anyone is a hearer of the word and not a doer, he is like a man who looks at his natural face in a mirror;24for [once] he has looked at himself and gone away, he has immediately forgotten what kind of person he was.25But one who looks intently at the perfect law, the [law] of liberty, and abides by it, not having become a forgetful hearer but an effectual doer, this man will be blessed in what he does.). The women’s mirror gives a complete picture of who is looking into it, but is not a means to change what is wrong. The mirror of the Word of God also gives a complete picture of who looks at himself in it, but it does give a means to change. Whoever sees himself as a sinner also reads how forgiveness and acceptance by God can take place.
Women on various occasions give an essential contribution to the work of God. They
1. serve the Lord with their goods (Lk 8:1-31Soon afterwards, He [began] going around from one city and village to another, proclaiming and preaching the kingdom of God. The twelve were with Him,2and [also] some women who had been healed of evil spirits and sicknesses: Mary who was called Magdalene, from whom seven demons had gone out,3and Joanna the wife of Chuza, Herod’s steward, and Susanna, and many others who were contributing to their support out of their private means.);
2. sit at His feet (Lk 10:3939She had a sister called Mary, who was seated at the Lord’s feet, listening to His word.);
3. anoint him (Lk 7:3737And there was a woman in the city who was a sinner; and when she learned that He was reclining [at the table] in the Pharisee’s house, she brought an alabaster vial of perfume,.38; Jn 12:33Mary then took a pound of very costly perfume of pure nard, and anointed the feet of Jesus and wiped His feet with her hair; and the house was filled with the fragrance of the perfume.);
4. are at the cross (Jn 19:2525Therefore the soldiers did these things. But standing by the cross of Jesus were His mother, and His mother’s sister, Mary the [wife] of Clopas, and Mary Magdalene.);
5. are at the tomb and at His resurrection (Mt 28:1-61Now after the Sabbath, as it began to dawn toward the first [day] of the week, Mary Magdalene and the other Mary came to look at the grave.2And behold, a severe earthquake had occurred, for an angel of the Lord descended from heaven and came and rolled away the stone and sat upon it.3And his appearance was like lightning, and his clothing as white as snow.4The guards shook for fear of him and became like dead men.5The angel said to the women, “Do not be afraid; for I know that you are looking for Jesus who has been crucified.6He is not here, for He has risen, just as He said. Come, see the place where He was lying.);
6. see Him first after His resurrection (Mt 28:7-97Go quickly and tell His disciples that He has risen from the dead; and behold, He is going ahead of you into Galilee, there you will see Him; behold, I have told you.”8And they left the tomb quickly with fear and great joy and ran to report it to His disciples.9And behold, Jesus met them and greeted them. And they came up and took hold of His feet and worshiped Him.);
7. are His messengers (Mt 28:1010Then Jesus *said to them, “Do not be afraid; go and take word to My brethren to leave for Galilee, and there they will see Me.”; Jn 20:16-1816Jesus *said to her, “Mary!” She turned and *said to Him in Hebrew, “Rabboni!” (which means, Teacher).17Jesus *said to her, “Stop clinging to Me, for I have not yet ascended to the Father; but go to My brethren and say to them, ‘I ascend to My Father and your Father, and My God and your God.’”18Mary Magdalene *came, announcing to the disciples, “I have seen the Lord,” and [that] He had said these things to her.);
8. are the first to accept the gospel in Philippi (Acts 16:13-1513And on the Sabbath day we went outside the gate to a riverside, where we were supposing that there would be a place of prayer; and we sat down and began speaking to the women who had assembled.14A woman named Lydia, from the city of Thyatira, a seller of purple fabrics, a worshiper of God, was listening; and the Lord opened her heart to respond to the things spoken by Paul.15And when she and her household had been baptized, she urged us, saying, “If you have judged me to be faithful to the Lord, come into my house and stay.” And she prevailed upon us.);
9. form, with others, the core of the church (Acts 1:1414These all with one mind were continually devoting themselves to prayer, along with [the] women, and Mary the mother of Jesus, and with His brothers.).
See also Exodus 30:17-21.