Judges 20:11

So all the men of Israel were gathered against the city
Of Gibeah, even 360,000 men:

knit together as one man;
went heart and hand together, united in their sentiments and resolutions, determining to have justice done, or lose their lives in this cause: according to the Jews ^F5, this was on the twenty third of Shebet, which answers to part of January and part of February, on which day a fast was kept on this account.