20 And Ehud came to him (now he was sitting upstairs in his cool private chamber). Then Ehud said, "I have a message from God for you." So he arose from his seat. 21 Then Ehud reached with his left hand, took the dagger from his right thigh, and thrust it into his belly. 22 Even the hilt went in after the blade, and the fat closed over the blade, for he did not draw the dagger out of his belly; and his entrails came out. 23 Then Ehud went out through the porch and shut the doors of the upper room behind him and locked them. 24 When he had gone out, Eglon's servants came to look, and to their surprise, the doors of the upper room were locked. So they said, "He is probably attending to his needs in the cool chamber." 25 So they waited till they were embarrassed, and still he had not opened the doors of the upper room. Therefore they took the key and opened them. And there was their master, fallen dead on the floor.
Matthew Henry's Commentary on Judges 3:20-25
Commentary on Judges 3:12-30
(Read Judges 3:12-30)
When Israel sins again, God raises up a new oppressor. The Israelites did ill, and the Moabites did worse; yet because God punishes the sins of his own people in this world, Israel is weakened, and Moab strengthened against them. If lesser troubles do not do the work, God will send greater. When Israel prays again, God raises up Ehud. As a judge, or minister of Divine justice, Ehud put to death Eglon, the king of Moab, and thus executed the judgments of God upon him as an enemy to God and Israel. But the law of being subject to principalities and powers in all things lawful, is the rule of our conduct. No such commissions are now given; to pretend to them is to blaspheme God. Notice Ehud's address to Eglon. What message from God but a message of vengeance can a proud rebel expect? Such a message is contained in the word of God; his ministers are boldly to declare it, without fearing the frown, or respecting the persons of sinners. But, blessed be God, they have to deliver a message of mercy and of free salvation; the message of vengeance belongs only to those who neglect the offers of grace. The consequence of this victory was, that the land had rest eighty years. It was a great while for the land to rest; yet what is that to the saints' everlasting rest in the heavenly Canaan.