# the Aramean army hear a noise of chariots, and a noise of horses—the noise of another large army
God caused the army of Aram to hear the sound of an enormous army approaching so they all ran away leaving all their food behind. This was not an actual army, but the Lord had made them hear these sounds.
# they said to each other
"the Aramean soldiers said to each other"
# the kings of the Hittites and Egyptians
"the armies of the Hittites and the Egyptians"
# to come against us
"to fight us" or "to attack us"