Judges 3:16 in the King James Version
But Ehud made him a dagger which had two edges, of a cubit length; and he did gird it under his raiment upon his right thigh.
Context
15 But when the children of Israel cried to the LORD, the LORD raised up a savior for them: Ehud the son of Gera, the Benjamite, a left-handed man. The children of Israel sent tribute by him to Eglon the king of Moab.
16 Ehud made himself a sword which had two edges, a cubit in length; and he wore it under his clothing on his right thigh.
17 He offered the tribute to Eglon king of Moab. Now Eglon was a very fat man.