ירמיהו, פרק מ״ח, פסוק מ׳

The impending destruction and the sorrowful lament over Moab are captured through the powerful imagery of an eagle. A majestic bird spreading its wings and swooping down serves as a striking symbol for an invading enemy [ביאור שטיינזלץ]. The primary approach among commentators is that this fierce attacker represents Nebuchadnezzar [רד״ק], who will travel from a distant land to carry out the devastation [ביאור שטיינזלץ].

The specific nature of the eagle's flight is central to understanding the attack. While the description refers to general flying [רש״י, מצודת ציון], it specifically highlights a sudden and rapid descent [רד״ק, מצודת דוד]. The movement points to an exceptionally high speed that is distinct from ordinary flight [מלבי״ם]. This emphasizes the swift and completely unexpected manner in which the enemy forces will arrive to overwhelm the nation.