1 Chronicles 20:1

And it came to pass at the return of the year, at the [time of the] going forth of kings [to war], that Joab gathered the whole force of the army, and they ravaged the land of the children of Ammon; and he came and besieged Rabba. But David abode in Jerusalem. And Joab struck Rabba and destroyed it.

And it came to pass, that after the year was expired, at the time that kings go out to battle, Joab led forth the power of the army, and wasted the country of the children of Ammon, and came and besieged Rabbah. But David tarried at Jerusalem. And Joab smote Rabbah, and destroyed it.

At the time of the return of the year, at the time when kings go out, Joab led out the army and wasted the country of the children of Ammon, and came and besieged Rabbah. But David stayed at Jerusalem. Joab struck Rabbah, and overthrew it.