An arrow without a Bow can be a weapon. There is Scripture where only the Arrow is mentioned.
Balaam prophesies over Israel:
Numbers 24:8 God brought him forth out of Egypt; he hath as it were the strength of an unicorn: he shall eat up the nations his enemies, and shall break their bones, and pierce them through with his arrows.
God speaking about sinning Israel:
Deuteronomy 32:23 I will heap mischiefs upon them; I will spend mine arrows upon them.
Deuteronomy 32:42 I will make mine arrows drunk with blood, and my sword shall devour flesh; and that with the blood of the slain and of the captives, from the beginning of revenges upon the enemy.
Jonathan warns David about Saul:
1 Samuel 20:20-22 And I will shoot three arrows on the side thereof, as though I shot at a mark. And, behold, I will send a lad, saying, Go, find out the arrows. If I expressly say unto the lad, Behold, the arrows are on this side of thee, take them; then come thou: for there is peace to thee, and no hurt; as the LORD liveth. But if I say thus unto the young man, Behold, the arrows are beyond thee; go thy way: for the LORD hath sent thee away.
1 Samuel 20:36-37 And he said unto his lad, Run, find out now the arrows which I shoot. And as the lad ran, he shot an arrow beyond him. And when the lad was come to the place of the arrow which Jonathan had shot, Jonathan cried after the lad, and said, Is not the arrow beyond thee?
The most High spoke and then:
2 Samuel 22:15 And he sent out arrows, and scattered them; lightning, and discomfited them.
The Lord warns the king of Assyria:
2 Kings 19:32 Therefore thus saith the LORD concerning the king of Assyria, He shall not come into this city, nor shoot an arrow there, nor come before it with shield, nor cast a bank against it
Isaiah 37:33 Therefore thus saith the LORD concerning the king of Assyria, He shall not come into this city, nor shoot an arrow there, nor come before it with shields, nor cast a bank against it.
And to Job:
Job 6:4 For the arrows of the Almighty are within me, the poison whereof drinketh up my spirit: the terrors of God do set themselves in array against me.
Job 41:28 The arrow cannot make him flee: slingstones are turned with him into stubble
From the Psalmist:
Psalm 18:14 Yea, he sent out his arrows, and scattered them; and he shot out lightnings, and discomfited them.
Psalm 21:12 Therefore shalt thou make them turn their back, when thou shalt make ready thine arrows upon thy strings against the face of them.
Psalm 45:5 Thine arrows are sharp in the heart of the king’s enemies; whereby the people fall under thee.
Psalm 57:4 My soul is among lions: and I lie even among them that are set on fire, even the sons of men, whose teeth are spears and arrows, and their tongue a sharp sword.
Psalm 64:7 But God shall shoot at them with an arrow; suddenly shall they be wounded.
Psalm 77:17 The clouds poured out water: the skies sent out a sound: thine arrows also went abroad.
Psalm 91:5 Thou shalt not be afraid for the terror by night; nor for the arrow that flieth by day;
Psalm 120:4 Sharp arrows of the mighty, with coals of juniper.
Psalm 127:4 As arrows are in the hand of a mighty man; so are children of the youth.
And from Proverbs:
Proverbs 25:18 A man that beareth false witness against his neighbour is a maul, and a sword, and a sharp arrow.
Proverbs 26:18 As a mad man who casteth firebrands, arrows, and death,
From Jeremiah:
Jeremiah 50:9 For, lo, I will raise and cause to come up against Babylon an assembly of great nations from the north country: and they shall set themselves in array against her; from thence she shall be taken: their arrows shall be as of a mighty expert man; none shall return in vain.
Jeremiah 51:11 Make bright the arrows; gather the shields: the LORD hath raised up the spirit of the kings of the Medes: for his device is against Babylon, to destroy it; because it is the vengeance of the LORD, the vengeance of his temple.
And Ezekiel:
Ezekiel 5:16 When I shall send upon them the evil arrows of famine, which shall be for their destruction, and which I will send to destroy you: and I will increase the famine upon you, and will break your staff of bread:
Ezekiel 21:21 For the king of Babylon stood at the parting of the way, at the head of the two ways, to use divination: he made his arrows bright, he consulted with images, he looked in the liver.
