Jamieson, Fausset and Brown on 1 Samuel 18:6

6. the women came out of all cities of Israel--in the homeward march from the pursuit of the Philistines. This is a characteristic trait of Oriental manners. On the return of friends long absent, and particularly on the return of a victorious army, bands of women and children issue from the towns and villages, to form a triumphal procession, to celebrate the victory, and, as they go along, to gratify the soldiers with dancing, instrumental music, and extempore songs, in honor of the generals who have earned the highest distinction by feats of gallantry. The Hebrew women, therefore, were merely paying the customary gratulations to David as the deliverer of their country, but they committed a great indiscretion by praising a subject at the expense of their sovereign.