'Mounting' in the Bible

The sound of a whip, And the sound of the rattling of a wheel, And of a prancing horse, and of a bounding chariot, Of a horseman mounting.

the horseman mounting, and the flashing sword, and the glittering spear, and a multitude of slain, and a great heap of corpses, and there is no end of the bodies; they stumble upon their bodies;-