20:1 Then all the people of Israel came out, from Dan to Beersheba, including the land of Gilead, and the congregation assembled as one man to the Lord at Mizpah. 2 And the chiefs of all the people, of all the tribes of Israel, presented themselves in the assembly of the people of God, 400,000 men on foot that drew the sword. 3 (Now the people of Benjamin heard that the people of Israel had gone up to Mizpah.) And the people of Israel said, “Tell us, how did this evil happen?” 4 And the Levite, the husband of the woman who was murdered, answered and said, “I came to Gibeah that belongs to Benjamin, I and my concubine, to spend the night. 5 And the leaders of Gibeah rose against me and surrounded the house against me by night. They meant to kill me, and they violated my concubine, and she is dead. 6 So I took hold of my concubine and cut her in pieces and sent her throughout all the country of the inheritance of Israel, for they have committed abomination and outrage in Israel. 7 Behold, you people of Israel, all of you, give your advice and counsel here.”
8 And all the people arose as one man, saying, “None of us will go to his tent, and none of us will return to his house. 9 But now this is what we will do to Gibeah: we will go up against it by lot, 10 and we will take ten men of a hundred throughout all the tribes of Israel, and a hundred of a thousand, and a thousand of ten thousand, to bring provisions for the people, that when they come they may repay Gibeah of Benjamin, for all the outrage that they have committed in Israel.” 11 So all the men of Israel gathered against the city, united as one man.
12 And the tribes of Israel sent men through all the tribe of Benjamin, saying, “What evil is this that has taken place among you? 13 Now therefore give up the men, the worthless fellows in Gibeah, that we may put them to death and purge evil from Israel.” But the Benjaminites would not listen to the voice of their brothers, the people of Israel. 14 Then the people of Benjamin came together out of the cities to Gibeah to go out to battle against the people of Israel. 15 And the people of Benjamin mustered out of their cities on that day 26,000 men who drew the sword, besides the inhabitants of Gibeah, who mustered 700 chosen men. 16 Among all these were 700 chosen men who were left-handed; every one could sling a stone at a hair and not miss. 17 And the men of Israel, apart from Benjamin, mustered 400,000 men who drew the sword; all these were men of war.
18 The people of Israel arose and went up to Bethel and inquired of God, “Who shall go up first for us to fight against the people of Benjamin?” And the Lord said, “Judah shall go up first.”
19 Then the people of Israel rose in the morning and encamped against Gibeah. 20 And the men of Israel went out to fight against Benjamin, and the men of Israel drew up the battle line against them at Gibeah. 21 The people of Benjamin came out of Gibeah and destroyed on that day 22,000 men of the Israelites. 22 But the people, the men of Israel, took courage, and again formed the battle line in the same place where they had formed it on the first day. 23 And the people of Israel went up and wept before the Lord until the evening. And they inquired of the Lord, “Shall we again draw near to fight against our brothers, the people of Benjamin?” And the Lord said, “Go up against them.” (ESV)