'Horsemen' in the Bible

and saith, 'This is the custom of the king who doth reign over you: Your sons he doth take, and hath appointed for himself among his chariots, and among his horsemen, and they have run before his chariots;

And the Philistines have been gathered to fight with Israel; thirty thousand chariots, and six thousand horsemen, and a people as the sand which is on the sea-shore for multitude; and they come up and encamp in Michmash, east of Beth-Aven.