This Bible contradiction is from the Skeptic's Annotated Bible.

Verses

On the seventh day

2 Kings 25:8-9 View context

And in the fifth month, on the seventh [day] of the month, which [is] the nineteenth year of king Nebuchadnezzar king of Babylon, came Nebuzar-adan, captain of the guard, a servant of the king of Babylon, unto Jerusalem:

And he burnt the house of the LORD, and the king's house, and all the houses of Jerusalem, and every great [man's] house burnt he with fire.

On the tenth day

Jeremiah 52:12-13 View context

Now in the fifth month, in the tenth [day] of the month, which [was] the nineteenth year of Nebuchadrezzar king of Babylon, came Nebuzar-adan, captain of the guard, [which] served the king of Babylon, into Jerusalem,

And burned the house of the LORD, and the king's house; and all the houses of Jerusalem, and all the houses of the great [men], burned he with fire: