Like the noise of chariots on the tops of mountains shall they leap, like the noise of a flame of fire that devoureth the stubble, as a strong people set in battle array. Like the noise of chariots - Bochart also remarks: -
"The locusts fly with a great noise, so as to be heard six miles off, and while they are eating the fruits of the earth, the sound of them is like that of a flame driven by the wind."
Ibid., p. 478.