Contradiction with Exodus 20:5
This verse speaks of God visiting the iniquity of the fathers upon the children, which may seem in contrast to the preservation command in Numbers 4:18.
Exodus 20:5: Thou shalt not bow down thyself to them, nor serve them: for I the LORD thy God [am] a jealous God, visiting the iniquity of the fathers upon the children unto the third and fourth [generation] of them that hate me;
Contradiction with Ezekiel 18:20
This verse states the soul that sins shall die, highlighting individual responsibility for sin, contrasting the collective concern in Numbers 4:18.
Ezekiel 18:20: The soul that sinneth, it shall die. The son shall not bear the iniquity of the father, neither shall the father bear the iniquity of the son: the righteousness of the righteous shall be upon him, and the wickedness of the wicked shall be upon him.
Contradiction with Isaiah 14:21
Commands to prepare slaughter for the iniquity of fathers, which can be seen as a contradiction to preventing cut-off in Numbers 4:18.
Isaiah 14:21: Prepare slaughter for his children for the iniquity of their fathers; that they do not rise, nor possess the land, nor fill the face of the world with cities.
Contradiction with Jeremiah 31:29-30
Emphasizes individual responsibility rather than collective (tribal) responsibility, which may conflict with the group-centric focus of Numbers 4:18.
Jeremiah 31:29-30: In those days they shall say no more, The fathers have eaten a sour grape, and the children's teeth are set on edge.