Revelation 1:16 - He had in His right hand seven stars, out of His mouth went a sharp two-edged sword, and His countenance was like the sun shining in its strength.
Revelation 2:12 - “And to the angel of the church in Pergamos write, ‘These things says He who has the sharp two-edged sword:
Revelation 2:16 - Repent, or else I will come to you quickly and will fight against them with the sword of My mouth.
Revelation 19:15 - Now out of His mouth goes a sharp sword, that with it He should strike the nations. And He Himself will rule them with a rod of iron. He Himself treads the winepress of the fierceness and wrath of Almighty God.
Revelation 19:21 - And the rest were killed with the sword which proceeded from the mouth of Him who sat on the horse. And all the birds were filled with their flesh.
Revelation 1:16 - (word for word translation):
καὶ ἔχων ἐν τῇ δεξιᾷ χειρὶ αὐτοῦ ἀστέρας ἑπτά, and having in the right hand His stars seven, καὶ ἐκ τοῦ στόματος αὐτοῦ ῥομφαία δίστομος ὀξεῖα ἐκπορευομένη, and from the mouth of-him sword two-mouth sharp going-forth, καὶ ἡ ὄψις αὐτοῦ ὡς ὁ ἥλιος φαίνει ἐν τῇ δυνάμει αὐτοῦ. and the face his as the sun shining in the strength of-it.
Notice these two underlined Greek words lined up here:
στόματος mouth
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δίστομος two-mouth
The word δίστομος translated 'two-edged' really is 'two-mouth' in the Greek.
According to "The Analytical Greek Lexicon Revised" edited by Howard K. Moulton (Pub. Zondervan) p. 377:
στόμα ], ατος, το, (§ 4. tab. D. c) the mouth, Mat. 12. 34; 15. 11, 17, 18; 21. 16, et al.; speech, words; Mat. 18. 16; 2 Co. 13. 1; command of speech, facility of language, Lu. 21, 15; from the Heb., ανοιγειν το στομα, to make utterance, to speak, Mat. 5. 2; 13. 35, et al.; also, used of the earth, to rend, yawn, Re. 12. 16; στόμα προς στόμα λαλειν, to speak mouth to mouth, face to face, 2 Jno. 12; 3 Jno. 14; the edge or point of a weapon, Lu. 21. 24; He. 11. 34.
στόμαχος, ου, ο, (§ 3. tab. C, a) pr. the gullet leading to the stomach; hence, later, the stomach itself, 1 Ti. 5. 23.
στόματα, acc. pl. . . . . . . . στόμα
στόματι, dat. sing. . . . . . . . id.
στόματος, gen. sing. . . . . . id. <---*
στόματων, gen. pl. . . . . . . . id.
and p. 108,
διστομος, ου, ο, η, (§ 7. rem. 2) (δις & στομα) pr. having two mouths; two-edged, He. 4.12; Re. 1. 16; 2. 12.
So clearly the root idea is the mouth that utters speech. So δίστομος is properly, literally two-mouth.
Matthew quotes from Psalm 78:
I will open my mouth in a parable; I will utter dark sayings of old,
(Psalm 78:2)that it might be fulfilled which was spoken by the prophet, saying: “I will open My mouth in parables; I will utter things kept secret from the foundation of the world.”
(Matthew 13:35)
And in the verse just before, it says:
All these things Jesus spoke to the multitude in parables; and without a parable He did not speak to them,
(Matthew 13:34)
So what comes out of Jesus mouth is di-mouthed speech, sayings with two meanings—literal and figurative:
Then He spoke many things to them in parables, saying: “Behold, a sower went out to sow. And as he sowed, some seed fell by the wayside; and the birds came and devoured them.
(Matthew 13:3-4)
The story looks literal, but He explains it to His students (disciples):
“Therefore hear the parable of the sower: When anyone hears the word of the kingdom, and does not understand it, then the wicked one comes and snatches away what was sown in his heart. This is he who received seed by the wayside.
(Matthew 13:18-20)
literal --> meaning
seed --> word of the kingdom
bird --> wicked one
soil --> his heart
etc.
For the weapons of our warfare are not carnal but mighty in God for pulling down strongholds,
(2 Corinthians 10:4)
The weapons (swords) of our warfare do not cut 'meat' (flesh made of atoms and molecules) they don't need metal "edges." No, they are the words of God which destroy 'fleshly' ideas in the mind (strongholds).
For the word of God is living and powerful, and sharper than any two-edged sword, piercing even to the division of soul and spirit, and of joints and marrow, and is a discerner of the thoughts and intents of the heart.
(Hebrews 4:12)