KJV:
By reason of the abundance of his horses their dust shall cover thee: thy walls shall shake at the noise of the horsemen, and of the wheels, and of the chariots, when he shall enter into thy gates, as men enter into a city wherein is made a breach.
NASB:
"Because of the multitude of his horses, the dust raised by them will cover you; your walls will shake at the noise of cavalry and wagons and chariots when he enters your gates as men enter a city that is breached.