Isaiah 10:19 - Ellicott's Commentary On The Whole Bible

And the rest of the trees of his forest shall be few. — To number the host of an army, to count killed and wounded after a battle, was commonly the work of the royal scribe, who appears so often as in that employment in Assyrian sculptures. Here the survivors (the “remnant” as before) were to be so few (literally, a number) that even the boy who could hardly count but on his fingers would be skilled enough to number them.