Contradiction with 2 Samuel 24:13
This verse presents the prophet Gad offering David three choices for punishment, whereas 1 Chronicles 21:9 introduces the message of punishment brought by Gad to David but describes the details differently.
2 Samuel 24:13: So Gad came to David, and told him, and said unto him, Shall seven years of famine come unto thee in thy land? or wilt thou flee three months before thine enemies, while they pursue thee? or that there be three days' pestilence in thy land? now advise, and see what answer I shall return to him that sent me.