'Enemy' in the Bible

Therefore I (Isaiah) will weep bitterly for Jazer, for the vines of Sibmah.I will drench you with my tears, O Heshbon and Elealeh;For the war-cry [of the enemy] has fallen on your summer fruits and your harvest.

But the multitude of your enemies [that assault you] will become like fine dust,And the multitude of the tyrants like the chaff which blows away;And it will happen in an instant, suddenly [that your enemy is destroyed].

For the tyrant will come to an end and the scorner will be finished,Indeed all who are intent on doing evil will be cut off—

At the sound of the tumult, the peoples flee;At the lifting up of Yourself nations scatter.

The highways are deserted, the traveler has ceased [to appear].The enemy has broken the covenant, he has rejected the cities,He has no regard for [any] man.

“Listen to Me in silence, you islands and coastlands,And let the nations gain their strength;Let them come near, then let them speak;Let us come together for judgment [and decide the issue between us concerning the enemy from the east].

So they will fear the name of the Lord from the westAnd His glory from the rising of the sun.For He will come in like a narrow, rushing streamWhich the breath of the Lord drives [overwhelming the enemy].

But they rebelledAnd grieved His Holy Spirit;Therefore He changed into their enemy,And He fought against them.