Judges 3:16

And Ehud will make to him a sword, and to it two mouths; a cubit its length: and he will gird it from under his garments upon his right thigh.

Judges 3:21

And Ehud will stretch forth his left hand, and will take the sword from off his right thigh, and he will drive it into his belly:

Psalm 45:3

Gird thy sword upon the thigh, thou strong one in thy majesty and thine honor.

Psalm 149:6

The liftings up of God in their throat, and a sword of two mouths in their hand;

Song of Songs 3:8

All of them holding the sword, being trained to war: each his sword upon his thigh from terror in the night

Hebrews 4:12

For the word of God living, and effective, and more piercing than any two-mouthed sword, and penetrating even to the division both of soul and spirit, both the joints and marrows, and a critic of the reflections and thoughts of the heart.

Revelation 1:16

And having in his right hand seven stars: and going out of his mouth a sharp two-mouthed sword: and his sight as the sun shines in his power.

Revelation 2:12

And to the messenger to the calling out in Pergamos write: Thus says he having the sharp two-mouthed sword;

Treasury of Scripture Knowledge

Summary

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.

Bible References

Two edges

Psalm 149:6
The liftings up of God in their throat, and a sword of two mouths in their hand;
Hebrews 4:12
For the word of God living, and effective, and more piercing than any two-mouthed sword, and penetrating even to the division both of soul and spirit, both the joints and marrows, and a critic of the reflections and thoughts of the heart.
Revelation 1:16
And having in his right hand seven stars: and going out of his mouth a sharp two-mouthed sword: and his sight as the sun shines in his power.
Revelation 2:12
And to the messenger to the calling out in Pergamos write: Thus says he having the sharp two-mouthed sword;

Upon

Judges 3:21
And Ehud will stretch forth his left hand, and will take the sword from off his right thigh, and he will drive it into his belly:
Psalm 45:3
Gird thy sword upon the thigh, thou strong one in thy majesty and thine honor.
Song of Songs 3:8
All of them holding the sword, being trained to war: each his sword upon his thigh from terror in the night