Judges 3:15-16

15Again the Israelites called out to the Lord for help. He chose Ehud to be their leader. He was the son of Gera, from Benjamin's tribe. Ehud's strong hand was his left hand. The Israelites sent him to pay their taxes to King Eglon of Moab.

16Ehud made a short sword that was sharp on both sides. He tied it to the top of his right leg and he hid it under his coat.