Judges 7:2-3 (New International Version)

² The LORD said to Gideon, "You have too many men for me to deliver Midian into their hands. In order that Israel may not boast against me that her own strength has saved her, ³ announce now to the people, 'Anyone who trembles with fear may turn back and leave Mount Gilead.' " So twenty-two thousand men left, while ten thousand remained.