The Aramaic text of Luke 2:22 did not have the word "their" in front of purification; depending on the context and understanding of the Word of God as a whole, "her" purification is more logical.
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Word-by-word translation is "After complete day of purification according to Moses law, ascend to Jerusalem to stand before the LORD."
KJV Luke 2:22 And when the days of her purification according to the law of Moses were accomplished, they brought him to Jerusalem, to present him to the Lord
Luke 1:35 The angel replied, and said to her: The Holy Spirit will come, and the power of the Most High will overshadow thee; therefore he that is born of thee is HOLY, and will be called The Son of God. (Murdock)
The child Jesus is HOLY even before his 8 days based on announcement of Angel Gabriel; He has not entered the Covenant of Abraham before his circumcision but it touches nothing about His ceremonial uncleanness. Only his "mother" is ceremonially unclean according to Moses law.
KJV Lev 12:1 And the LORD spoke unto Moses, saying,
Lev 12:2 Speak unto the children of Israel, saying, If a woman have conceived seed, and borne a man child: then she shall be unclean seven days; according to the days of the separation for her infirmity shall she be unclean.
Lev 12:3 And in the eighth day the flesh of his foreskin shall be circumcised.
Lev 12:4 And she shall then continue in the blood of her purifying three and thirty days; she shall touch no hallowed thing, nor come into the sanctuary, until the days of her purifying be fulfilled.
Abrahamic covenant speaks of the male child that circumcision is a requirement to ENTER the covenant and not specifically about male child's ceremonial uncleanness and purification.
Gen 17:9 And God said unto Abraham, Thou shalt keep my covenant therefore, thou, and thy seed after thee in their generations.
Gen 17:10 This is my covenant, which ye shall keep, between me and you and thy seed after thee; Every man child among you shall be circumcised.
Gen 17:11 And ye shall circumcise the flesh of your foreskin; and it shall be a token of the covenant between me and you.
Gen 17:12 And
he that is eight days old shall be circumcised among you, every man child in your generations, he that is born in the house, or bought with money of any stranger, which is not of thy seed.
How can the Aramaic-English translation contradicts with the Word of God spoken by Angel?
Luke 1:35 The angel replied, and said to her: The Holy Spirit will come, and the power of the Most High will overshadow thee; therefore he that is born of thee is HOLY, and will be called The Son of God. (Murdock)
Luke 2:23 (as it is written in the law of the Lord, that every male opening the womb shall be called HOLY to the Lord
(Murdock)
It is obviously the Aramaic-English translation has went wrong but not the Aramaic manuscript.
Exo 13:1 And the LORD spoke unto Moses, saying,
Exo 13:2
Sanctify unto me all the firstborn, whatsoever openeth the womb among the children of Israel, both of man and of beast: it is mine.
Num 8:16 For they are wholly given unto me from among the children of Israel; instead of such as open every womb, even instead of the firstborn of all the children of Israel, have I taken them unto me.
Num 8:17 For all the firstborn of the children of Israel are mine, both man and beast: on the day that I smote every firstborn in the land of Egypt I
sanctified them for myself.
Every firstborn male child shall be dedicated to the LORD by circumcision on the 8th day from the time of birth. As far as I am concerned there is no Mosiac law on purification for a firstborn male child. It is a dedication or separation for the LORD YHWH by the 8th day.