Ehud made himself a double-edged sword 18 inches long. He strapped it to his right thigh under his clothes

Let the extolling of God [be] in their throat, and a double-edged sword in their hand,

in the end she’s as bitter as wormwood
and as sharp as a double-edged sword.

"Look, I am making you like a sharp threshing sledge, new and double-edged. You will thresh the mountains and crush them; you will make the hills like straw.