'Double edged' in the Bible

Ehud forged a double-edged sword that was one cubit long, tied it to his right thigh under his cloak,

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

But in the end she is 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.