New International Version (NIV)
12 Again the Israelites did evil in the eyes of the LORD, and because they did this evil the LORD gave Eglon king of Moab power over Israel. 13 Getting the Ammonites and Amalekites to join him, Eglon came and attacked Israel, and they took possession of the City of Palms.[Jericho]14The Israelites were subject to Eglon king of Moab for eighteen years.
15 Again the Israelites cried out to the LORD, and he gave them a deliverer—Ehud, a left-handed man, the son of Gera the Benjamite. The Israelites sent him with tribute to Eglon king of Moab. 16 Now Ehud had made a double-edged sword about a cubit [18 inches] long, which he strapped to his right thigh under his clothing. 17 He presented the tribute to Eglon king of Moab, who was a very fat man. 18 After Ehud had presented the tribute, he sent on their way those who had carried it. 19But on reaching the stone images near Gilgal he himself went back to Eglon and said, “Your Majesty, I have a secret message for you.”
The king said to his attendants, “Leave us!” And they all left.
20 Ehud then approached him while he was sitting alone in the upper room of his palace and said, “I have a message from God for you.” As the king rose from his seat, 21 Ehud reached with his left hand, drew the sword from his right thigh and plunged it into the king’s belly. 22 Even the handle sank in after the blade, and his bowels discharged. Ehud did not pull the sword out, and the fat closed in over it. 23 Then Ehud went out to the porch; he shut the doors of the upper room behind him and locked them.
24 After he had gone, the servants came and found the doors of the upper room locked. They said, “He must be relieving himself in the inner room of the palace.” 25They waited to the point of embarrassment, but when he did not open the doors of the room, they took a key and unlocked them. There they saw their lord fallen to the floor, dead.
26 While they waited, Ehud got away. He passed by the stone images and escaped to Seirah. 27When he arrived there, he blew a trumpet in the hill country of Ephraim, and the Israelites went down with him from the hills, with him leading them.
28“Follow me,” he ordered, “for the LORD has given Moab, your enemy, into your hands.” So they followed him down and took possession of the fords of the
Jordan that led to Moab; they allowed no one to cross over. 29 At that time they struck down about ten thousand Moabites, all vigorous and strong; not one escaped. 30That day Moab was made subject to Israel, and the land had peace for eighty years.
31 After Ehud came Shamgar son of Anath, who struck down six hundred Philistines with an oxgoad. He too saved Israel.
I do not remember hearing this story in Sunday School, probably because of the level of gore. Once again, the Israelites were bad, so Yahweh let some other country rule them for a while (Moab led by Eglon). When the Israelites call on Yahweh, he gets a man to kill the enemies and free the Israelites.
This story is unique in that Eglon is so fat that Ehud’s sword is swallowed by the fat and can not be pulled out. It also includes the wonderful image of Eglon’s bowels discharging. This is another example of Yahweh getting men to do his killing for him. Sometimes he just kills evil people (Onan and Er), but most of the time he orders men to do his killing for him. Yahweh follows the killing of Eglon with the killing of 10,000 Moabites and later 600 Philistines.