A quiver rattles at his side, along with a flashing spear and lance.
God, having displayed his own power in those creatures that are strong and despise man, here shows it in one scarcely inferior to any of them in strength, and yet very tame and serviceable to man, and that is the horse, especially the horse that is prepared against the day of battle and is serviceable to man at a time when he has more than ordinary occasion for his service.
Commenting on Job 39:19-25
The quiver rattleth against him,.... The quiver is what arrows are put into and carried in, and seems here to be put for arrows, which being shot by the enemy come whizzing about him, but do not intimidate him; unless this is to be understood of arrows rattling in the quiver when carried by the rider "upon him", so some render the last word; and...
quiver--for the arrows, which they contain, and which are directed "against him." glittering spear--literally, "glittering of the spear," like "lightning of the spear" (Hab 3:11). shield--rather, "lance."