Bamidbar 31:3-5

Orthodox Jewish Bible

³ And Moshe spoke unto HaAm, saying, Arm some of your anashim unto war, let them go against Midyan, and avenge Hashem of Midyan.

⁴ Of every matteh a thousand, throughout kol mattot Yisroel, shall ye send to war.

⁵ So there were supplied out of the thousands of Yisroel, an elef (a thousand) of every matteh, sheneym asar elef armed for war.