Adam Clarke on Jeremiah 8:16

The snorting of his horses was heard from Dan - From this to the end of Jer 8:15 is repeated from Babylon to Jerusalem; and it was by this city, after the battle of Carchemish, that Nebuchadnezzar, in pursuing the Egyptians, entered Palestine.

The whole land trembled at the sound of the neighing of his strong ones - Of his war horses. This is a fine image; so terrible was the united neighing of the cavalry of the Babylonians that the reverberation of the air caused the ground to tremble. This is better, and more majestic, than the celebrated line of Virgil: -

Quadrupe - dante pu - trem soni-tu quatit ungula campum.

It would be much easier to shake the ground with the prancings of many horses, than to cause an earthquake by the sound of the neighing of the troops of cavalry.