Contradiction with 2 Samuel 6:6-7
This verse describes the punishment of Uzzah for touching the Ark, contradicting 1 Samuel 6:15 where the Levites handle the Ark without such consequence.
2 Samuel 6:6-7: And when they came to Nachon's threshingfloor, Uzzah put forth [his hand] to the ark of God, and took hold of it; for the oxen shook [it]. [Nachon: also called Chidon] [shook it: or, stumbled]
Contradiction with Numbers 4:15
States that touching the holy things, including the Ark, results in death, whereas in 1 Samuel 6:15, the Levites touch it without dying.
Numbers 4:15: And when Aaron and his sons have made an end of covering the sanctuary, and all the vessels of the sanctuary, as the camp is to set forward; after that, the sons of Kohath shall come to bear [it]: but they shall not touch [any] holy thing, lest they die. These [things are] the burden of the sons of Kohath in the tabernacle of the congregation.