Contradiction with Hebrews 9:4
This verse states that Aaron's rod that budded is also kept in the Ark of the Covenant, in addition to the pot of manna, which is not mentioned in Exodus 16:33.
Hebrews 9:4: Which had the golden censer, and the ark of the covenant overlaid round about with gold, wherein [was] the golden pot that had manna, and Aaron's rod that budded, and the tables of the covenant;
Contradiction with 1 Kings 8:9
This verse notes that only the two tablets of stone were inside the Ark of the Covenant, contradicting the statement in Exodus 16:33 that the pot of manna was to be kept there.
1 Kings 8:9: [There was] nothing in the ark save the two tables of stone, which Moses put there at Horeb, when the LORD made [a covenant] with the children of Israel, when they came out of the land of Egypt. [when the: or, where the]