Judges 20:29-33

Then Israel set men in ambush all around Gibeah. And the children of Israel went up against the children of Benjamin on the third day, and put themselves in battle array against Gibeah as at the other times. So the children of Benjamin went out against the people, and were drawn away from the city. They began to strike down and kill some of the people, as at the other times, in the highways (one of which goes up to Bethel and the other to Gibeah) and in the field, about thirty men of Israel. And the children of Benjamin said, “They are defeated before us, as at first.” But the children of Israel said, “Let us flee and draw them away from the city to the highways.” So all the men of Israel rose from their place and put themselves in battle array at Baal Tamar. Then Israel’s men in ambush burst forth from their position in the plain of Geba.