…threescore valiant men are about it, of the valiant of Israel. They all hold swords, being expert in war: every man hath his sword upon his thigh because of fear in the night. – Song of Songs 3:7,8
Notice that these men are all well armed. The text says expressly, “They all hold swords.” What swords are these? Every valiant man in Christ’s Israel holds the sword of the Spirit, which is the Word of God. A man who is a good textuary will usually be a good divine; he who draws from the treasury of the written Word will find his spoken word to be fruitful in profit to the people of God. If we use carnal reason; if we rely upon refinement, argument, eloquence, or any other form of the wisdom of man, we shall soon find our enemies will defeat us; but to ply the Word right and left; to give Gospel cuts and strokes such as the devil himself cannot parry, this is to overcome the world through the Word of God. Besides this, and here is an opportunity for you all to carry swords-every valiant man in God’s Israel carries the sword of prayer, which is comparable to those huge two-handed swords of the olden time, which the soldier lifted up and brought down with such tremendous force, as to cleave a man in halves: prayer is a weapon which no man can effectually resist. If you know how to use it, bring it down upon your foeman’s head, and woe unto him! I would to God that in this Church there were found many of these valiant men of Israel! Indeed, would God all the Lord’s servants were prophets, that it might be said of all of you that you hold swords. Your holy lives can be swords with which to smite your enemies. The tongues with which you speak of Christ lovingly, tenderly, persuasively-these may be weapons against our common enemy. Oh! that when we hear the muster roll at last, it may be said of every Church-member that he held a sword! Do not tremble, ye timid ones, for the ark of the Lord; neither let your fears promote your unbelief; God knows full well how to give the right weapons to the right men, and His Church shall be secure even to the end. ~ C.H. Spurgeon
https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0482.cfm