Contradiction with Numbers 8:17
It states that all the firstborn of the children of Israel are God's, contradicting Numbers 3:11's specific focus on the Levites.
Numbers 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.
Contradiction with Exodus 13:2
This verse declares that all firstborn males, human and animal, are to be consecrated to God, suggesting a broader claim than Numbers 3:11, which specifies the Levites in place of all firstborn sons.
Exodus 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.
Contradiction with Deuteronomy 10:8
Describes broader duties of the Levites, which seems to contradict the specific delegation of the firstborn's service mentioned in Numbers 3:11.
Deuteronomy 10:8: At that time the LORD separated the tribe of Levi, to bear the ark of the covenant of the LORD, to stand before the LORD to minister unto him, and to bless in his name, unto this day.
Contradiction with Hebrews 7:12
Indicates a change in the law and priesthood, which can be seen as contradicting the permanent dedication of the Levites stated in Numbers 3:11.
Hebrews 7:12: For the priesthood being changed, there is made of necessity a change also of the law.
Contradiction with 1 Samuel 2:28
Speaks of Aaron and his descendants chosen for priesthood, contrasting the focus on Levites as a whole in Numbers 3:11.
1 Samuel 2:28: And did I choose him out of all the tribes of Israel [to be] my priest, to offer upon mine altar, to burn incense, to wear an ephod before me? and did I give unto the house of thy father all the offerings made by fire of the children of Israel?