What is "scourers"

Usage examples of "scourers".

Romans beat the wood for them when they fled, and she, the fleer, was at point to be taken, and saw two taken indeed, and haled off by the Roman scourers of the wood.

CHARGERS that pant, And the hoofs that strike fire, And the scourers at dawn, Who stir up the dust with it, And cleave through a host with it!