Speak to the children of Israel, and thou shalt say to them: If a woman having received seed shall bear a man child, she shall be unclean seven days, according to the days of separation of her flowers. And on the eighth day the infant shall be circumcised: But she shall remain three and thirty days in the blood of her purification. She shall touch no holy thing: neither shall she enter into the sanctuary, until the days of her purification, be fulfilled. But if she shall bear a maid child, she shall be unclean two weeks, according to the custom of her monthly courses, and she shall remain in the blood of her purification sixty-six days.And also from the New Testament:
And when the days of her purification are expired, for a son, or for a daughter, she shall bring to the door of the tabernacle of the testimony, a lamb of a year old for a holocaust, and a young pigeon or a turtle for sin, and shall deliver them to the priest: Who shall offer them before the Lord, and shall pray for her, and so she shall be cleansed from the issue of her blood. This is the law for her that beareth a man child or a maid child.
And if her hand find not sufficiency, and she is not able to offer a lamb, she shall take two turtles, or two young pigeons, one for a holocaust, and another for sin: and the priest shall pray for her, and so she shall be cleansed.
Luke 2:22-24This is the day they meet Anna and Simeon and hear the prophesy (also from Luke 2):
And after the days of her purification, according to the law of Moses, were accomplished, they carried him to Jerusalem, to present him to the Lord: As it is written in the law of the Lord: Every male opening the womb shall be called holy to the Lord: And to offer a sacrifice, according as it is written in the law of the Lord, a pair of turtledoves, or two young pigeons.
"And his father and his mother marveled at what was said about him; and Simeon blessed them and said to Mary his mother, “Behold, this child is destined to be the rise and the fall of many in Israel, and a sign that is spoken against (and a sword will pierce through your own soul also), that thoughts out of many hearts may be revealed.”
Msgr. Charles Pope has written an article called "A Dramatic Moment That Almost Everyone Missed":
The ascent to Jerusalem is a steep one. The mountains surround Jerusalem and the City sits up at a higher altitude than the area around it. As the ancient Jews made the climb they sang the psalms of ascent: Psalms 120-134. As Joseph and Mary ascended they too sang the words that instilled joy: I Lift up mine eye to the mountains from whence cometh my help (121)…..I rejoiced when they said to me let us go up to the House of the Lord (122)…..To you O Lord I have lifted my eyes (123)….Like Mount Zion are those who trust in the Lord (125)….Out of the depths I call unto you O Lord! (130)…..Let us enter God’s dwelling, let us worship at the Lord’s footstool. Arise O Lord and enter your dwelling place, You and the Ark of your strength! (132)….Come and bless the Lord, You who stand in the House of the Lord Lift your hands to the Sanctuary and bless the Lord. The Lord bless you from Zion (134).
Singing these songs, Mary carried Jesus. The climb was even more difficult carrying a newborn babe. But the burden was sweet. A final ascent up the stairs to the Temple Mount. Likely they entered on the southern side through the Huldah gates. Going up the steep stairs, through the tunnel in the walls and emerging on to the bright Temple platform above.
God had returned to His Temple. He, and the Ark who carried him, were found. Mary the Ark, carrying Jesus in her arms. Jesus, very God, true God from True God. Yes, God and the Ark had been found and God was once again present among His people on the Temple Mount. Scripture says:
And the Lord, whom ye seek, shall suddenly come to his Temple, even the messenger of the covenant, whom ye delight in: behold, he shall come, saith the LORD of hosts. But who may abide the day of his coming? and who shall stand when he appeareth? (Mal 3:1-2)