King James Version
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.English Standard Version
In the spring of the year, the time when kings go out to battle, David sent Joab, and his servants with him, and all Israel. And they ravaged the Ammonites and besieged Rabbah. But David remained at Jerusalem.New International Version
In the spring, at the time when kings go off to war, David sent Joab out with the king's men and the whole Israelite army. They destroyed the Ammonites and besieged Rabbah. But David remained in Jerusalem.