Book of Joel Chapter 1 Vs. 6

 An Invasion of Locusts

Verses 6-7: “My land … vine … fig tree”: The possessive pronoun refers to the Lord. He is the owner of the land (Lev. 25:23; Num. 36:2; Eze. 38:16), the vine, and the fig tree (Hos. 2:9). Instead of symbols of prosperity and peace (1Kgs. 4:25; Mic. 4:4; Zec. 3:10), the vine and fig tree had become visual reminders of divine judgment.

For a nation is come up upon my land, strong, and without number, whose teeth are the teeth of a lion, and he hath the cheek teeth of a great lion. Joel 1:6

כִּי

kı̂y

kee

A primitive particle (the full form of the prepositional prefix) indicating causal relations of all kinds, antecedent or consequent; (by implication) very widely used as a relative conjugation or adverb; often largely modified by other particles annexed: - and, + (forasmuch, inasmuch, where-) as, assured [-ly], + but, certainly, doubtless, + else, even, + except, for, how, (because, in, so, than) that, + nevertheless, now, rightly, seeing, since, surely, then, therefore, + (al-) though, + till, truly, + until, when, whether, while, who, yea, yet,

a nation is... The only nation that will come against Judah in the day of the Lord will be that of the future Antichrist from Syria and Babylon (Eze. 38-39; Dan. 11:41-45; 2Thes. 2:3-4; Rev. 16:13-16; 19:11-21). His army of that day is called "the northern army" (Joel 2:20). A literal invasion of locusts pictured the kind of destruction and judgment inflicted by human armies.

גֹּי גּוֹי

gôy gôy

go'ee, go'-ee

Apparently from the same root as H1465 (in the sense of massing); a foreign nation; hence a Gentile; also (figuratively) a troop of animals, or a flight of locusts: - Gentile, heathen, nation, people.

teeth of a... Joel described these hostile, countless locusts as possessing the fangs of a lioness, so able were they to devour anything in their path. They are occasionally used as symbolic of violence (Gen. 49:9; Num. 23:24), and of the violent, awesome nature of God’s judgment (Isa. 30:6; Hos. 13:8).

The key word in this verse is my. Judah was His people. This nation could not come against God’s land, except God ordained it. God sent this vicious nation against His people and land.

The teeth of a lion speaks of the great destruction.

Proverbs 30:14 “[There is] a generation, whose teeth [are as] swords, and their jaw teeth [as] knives, to devour the poor from off the earth, and the needy from [among] men.”

שֵׁן

shên

shane'

From H8150; a tooth (as sharp); specifically (for H8143) ivory; figuratively a cliff: - crag, X forefront, ivory, X sharp, tooth.

Like a mighty nation an innumerable (without number) swarm of locusts had invaded the prophet’s land. Their ability to devour was like that of a lion, which can rip and tear almost anything with its powerful teeth (likened to fangs).

גֹּי גּוֹי

gôy gôy

go'ee, go'-ee

Apparently from the same root as H1465 (in the sense of massing); a foreign nation; hence a Gentile; also (figuratively) a troop of animals, or a flight of locusts: - Gentile, heathen, nation, people.