This phrase surprised me to appearing both in Psalm 149 and Proverbs 5.
Pro 5:1 My son, attend unto my wisdom, and bow thine ear to my understanding:
Pro 5:2 That thou mayest regard discretion, and that thy lips may keep knowledge.
Pro 5:3 For the lips of a strange woman drop as an honeycomb, and her mouth is smoother than oil:
Pro 5:4 But her end is bitter as wormwood, sharp as a twoedged sword.
Pro 5:5 Her feet go down to death; her steps take hold on hell.
Scripture certainly says this other sword is sharp and dangerous….even leading this captured down to hell.
Gill writes…and doesn’t hold back any interpretation..
sharp as a twoedged sword; which cuts every way; as committing sin with an harlot hurts both soul and body; and the reflection upon it is very cutting and distressing, and destroys all comfort and happiness. This is the reverse of her soothing and softening speech, which is as oil. Such also will be the sad case of the worshippers of the beast, or whore of Rome; who will gnaw their tongues for pain, and be killed with the twoedged sword that proceedeth out of the mouth of Christ, Rev 16:10.
her steps take hold on hell; make sure of it; hell is the certain portion of the harlot, and of all those that follow her lewd courses, unless reclaimed by the grace of God; and this will be the case of the worshippers of antichrist, or who give into the idolatries of the church of Rome, or commit fornication with her, Rev 14:9. Or, “her steps support hell” (h); keep it up, and fill it with inhabitants; millions are carried into it by her means: or, reach unto hell; she stops not till she comes there, and her followers with her. The word may be rendered “the grave”, and may respect such whores who haunted burying places, and prostituted themselves among the graves; and were called from hence “bustuariae moechae” (i).
Rev 14:9 And the third angel followed them, saying with a loud voice, If any man worship the beast and his image, and receive his mark in his forehead, or in his hand,
Rev 16:10 And the fifth angel poured out his vial upon the seat of the beast; and his kingdom was full of darkness; and they gnawed their tongues for pain,
Rev 16:11 And blasphemed the God of heaven because of their pains and their sores, and repented not of their deeds.
From what I’ve read this is old reformation teaching, and had been mostly put away by the counter reformation.
Getting back to the subject one sees Paul clearly using the word sword for God’s word here..
Eph 6:17 And take the helmet of salvation, and the sword of the Spirit, which is the word of God:
It is not us that bear the sword but the Spirit makes his word available to us.
and the sword of the Spirit, which is the word of God; the word of God is compared to a “sword”, for its two edges, the law and Gospel; the one convicts of sin, and cuts to the heart for it, and the other cuts down all the goodliness of man; and the Scriptures in general are a sharp sword, in convincing of sin,reproving for it, and threatening with wrath and ruin, in refuting error and heresy, and repelling Satan’s temptations, and will be used in the destruction of antichrist: and this word may be called “the sword of the Spirit”, because it is not carnal, but of a spiritual nature; and is used by the spiritual man; and because the Holy Spirit, as the Ethiopic version here expresses it, is the author of it; and which he furnishes the saints with, and teaches them how to make use of, and makes it powerful and effectual. So the Jews say (t), the words of the law are like to a sword, and speak of חרב תורה “the sword of the law” (u).
The other passage shows up in Psalm 149.
Psa 149:6 Let the high praises of God be in their mouth, and a twoedged sword in their hand;
Gill explains more about this sword.
and a twoedged sword in their hand; which is no other than the word of God, Eph 6:17; one of its edges is the law, which sharply reproves and menaces for sin, threatening with curses, condemnation, and death; and which, in the Spirit’s hand, cuts deep into the hearts of men, lays open the corruption of their nature, and the swarms of sin which are in them; it causes pain and grief, working wrath in the conscience; it wounds and kills, and is therefore called the letter that kills, 2Co 3:6.
The other edge is the Gospel, which cuts in pieces the best of men; all their works of righteousness, which it removes from their justification and salvation; and all their wisdom, holiness, freewill power, and creature abilities; and it cuts down the worst in man, his sinful as well as his righteous self; it teaches him to deny ungodliness and worldly lusts; it is useful to refute errors, and defend truth: and it is an instrument, and only a passive instrument, used by the Lord, as his power unto salvation;
it is a sword, but only effectual as it is the sword of the Spirit; it is a part of the weapons of our warfare, and it is mighty, but only through God; it can do nothing of itself, but as it is in the hand of another; and it should be in the hands of all the saints in common, as well as in the hands of Gospel ministers, to withstand error, maintain truth, and repel the temptations of Satan. The Targum is,
“the praises of God in their throats, and as twoedged swords in their hands;”
making the praises of God and the twoedged swords to be the same: and so Jarchi and R. Jeshuah in Aben Ezra interpret them.
Jesus gave us the Great commission…
Mat 28:18 And Jesus came and spake unto them, saying, All power is given unto me in heaven and in earth.
Mat 28:19 Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:
Mat 28:20 Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you alway, even unto the end of the world. Amen.
Joh 17:14 I have given them thy word; and the world hath hated them, because they are not of the world, even as I am not of the world.
Joh 17:17 Sanctify them through thy truth: thy word is truth.
Joh 16:7 Nevertheless I tell you the truth; It is expedient for you that I go away: for if I go not away, the Comforter will not come unto you; but if I depart, I will send him unto you.
Joh 16:8 And when he is come, he will reprove the world of sin, and of righteousness, and of judgment:
Joh 16:9 Of sin, because they believe not on me;
Joh 16:10 Of righteousness, because I go to my Father, and ye see me no more;
Joh 16:11 Of judgment, because the prince of this world is judged.
Joh 16:12 I have yet many things to say unto you, but ye cannot bear them now.
Joh 16:13 Howbeit when he, the Spirit of truth, is come, he will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, that shall he speak: and he will shew you things to come.
Joh 16:14 He shall glorify me: for he shall receive of mine, and shall shew it unto you.
Joh 16:15 All things that the Father hath are mine: therefore said I, that he shall take of mine, and shall shew it unto you.
It is also useful to see these examples of God’s word working…
Act 17:10 And the brethren immediately sent away Paul and Silas by night unto Berea: who coming thitherwent into the synagogue of the Jews.
Act 17:11 These were more noble than those in Thessalonica, in that they received the word with all readiness of mind, and searched the scriptures daily, whether those things were so.
2Ti 3:14 But continue thou in the things which thou hast learned and hast been assured of, knowing of whom thou hast learned them;
2Ti 3:15 And that from a child thou hast known the holy scriptures, which are able to make thee wise unto salvation through faith which is in Christ Jesus.
2Ti 3:16 All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:
2Ti 3:17 That the man of God may be perfect, throughly furnished unto all good works.