Contradiction with Numbers 3:15
This verse commands the counting of males from a month old and upward, while Numbers 4:39 specifies those from thirty to fifty years old.
Numbers 3:15: Number the children of Levi after the house of their fathers, by their families: every male from a month old and upward shalt thou number them.
Contradiction with Numbers 8:24
This verse allows Levites to serve from the age of twenty-five, contradicting Numbers 4:39, which specifies starting at thirty.
Numbers 8:24: This [is it] that [belongeth] unto the Levites: from twenty and five years old and upward they shall go in to wait upon the service of the tabernacle of the congregation: [to...: Heb. to war the warfare of, etc]
Contradiction with 1 Chronicles 23:24-27
David adjusts the age of Levitical service to twenty, conflicting with the thirty-year requirement in Numbers 4:39.
1 Chronicles 23:24-27: These [were] the sons of Levi after the house of their fathers; [even] the chief of the fathers, as they were counted by number of names by their polls, that did the work for the service of the house of the LORD, from the age of twenty years and upward.
Contradiction with Ezra 8:15-20
Levites are not mentioned as being pre-counted for service, while Numbers 4:39 emphasizes a specific count of Levites for service from ages thirty to fifty.
Ezra 8:15-20: And I gathered them together to the river that runneth to Ahava; and there abode we in tents three days: and I viewed the people, and the priests, and found there none of the sons of Levi. [abode: or, pitched]
Contradiction with Numbers 1:49
This verse exempts the Levites from a general census, whereas Numbers 4:39 counts them separately within a specific age range for service.
Numbers 1:49: Only thou shalt not number the tribe of Levi, neither take the sum of them among the children of Israel: