Judges 3:14-16

And the Israelites served Eglon king of Moab eighteen years. But when the Israelites cried out to the LORD [for help], the LORD raised up a man to rescue them, Ehud the son of Gera, a Benjamite, a left-handed man. And the Israelites sent a gift of tribute by him to Eglon king of Moab. Now Ehud made for himself a sword a cubit long, which had two edges, and he bound it on his right thigh under his robe.