2 Samuel 11:1,15-25
And it came to pass, after the year was expired, at the time when kings go forth to battle, that David sent Joab, and his servants with him, and all Israel; and they destroyed the children of Ammon, and besieged Rabbah. But David tarried still at Jerusalem.
Nave's Topical Index—AKJV

2 Samuel 12:26-29
And Joab fought against Rabbah of the children of Ammon, and took the royal city.
Nave's Topical Index—AKJV

1 Chronicles 20:1,2
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.
Nave's Topical Index—AKJV