May I ask where in Scripture is Mary identified with "the ark of the covenant"?
PARALLEL PASSAGES THAT PORTRAY THE ARK OF THE COVENANT AS AN OLD TESTAMENT TYPE OF THE VIRGIN MARY
Just as the glory of the Lord overshadowed the ark in the tabernacle, the Holy Spirit overshadowed Mary.
THE ARK: “Then a cloud covered the tent of the congregation, and the glory of the LORD filled the tabernacle.” Exodus 40:34.
MARY: “And the angel answered and said unto her, The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee.” Luke 1:35.
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In his narrative of the Visitation, Luke borrows heavily from references to the ark in 2 Samuel 6.
THE ARK: When trying to bring the ark up to the city, David said, "How can the ark of the Lord come to me?" 2 Samuel 6:9.
MARY: When Elizabeth greeted Mary she said, “[W]hence is this to me, that the mother of my Lord should come to me?” Luke 1:43.
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THE ARK: “[T]he ark of the LORD continued in the house of Obededom the Gittite three months.” 2 Samuel 6:11.
MARY: “And Mary abode with her [Elizabeth] about three months.” Luke 1:56.
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THE ARK: David was leaping before the ark as it was brought into the city. 2 Samuel 6:16.
MARY: At the sound of Mary’s voice, John leaped for joy in Elizabeth’s womb. Luke 1:44.
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The contents of the ark are all symbolic of Jesus, who was conceived in the womb of Mary.
THE ARK CONTAINED (1) a golden jar holding the manna (bread), (2) Aaron's rod which budded (the priesthood) and (3) the tables of the covenant (the word of God) Hebrews 9:4.
OUR LORD, CONCEIVED IN THE WOMB OF MARY is to us (1) the Bread of Life, John 6:48; our High Priest, Hebrews 5:10; and the eternal Word, John 1:1
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Finally, in the book of Revelation we see the ark of the covenant, whose whereabouts has been unknown since the time of Jeremiah. Next we see the majestic woman with a crown of twelve stars giving birth to a child who would rule the nations. We don’t tend to read these verses together because of a chapter division but when they were written, there was no division. There is definitely a nexus between the ark and the woman (Mary) who gives birth to the child (Jesus).
“And the temple of God which is in heaven was opened; and the ark of His covenant appeared in His temple, and there were flashes of lightning and sounds and peals of thunder and an earthquake and a great hailstorm. And there appeared a great wonder in heaven; a woman clothed with the sun, and the moon under her feet, and upon her head a crown of twelve stars.” Revelation 11:19-12:1.