A man named Sheba told the people of the ten tribes that David was Judah's king, but not their king. David worked hard to preserve unity in Israel after this time of division.
Joab used an idiom "has lifted up his hand against the king, against David" meaning "revolted against David," to explain why his army was attacking the city of Abel. (See: [[rc://en/ta/man/jit/figs-idiom]])