Rashi, on Isa 10:19

“And they that remain of the trees of his forest shall be so few, that they shall easily be numbered, and a child shall write them down.”

“And the remaining trees of his forest The survivors of his armies. shall be few [lit. a number, i. e.,] easy to count, for they will be few, and a lad will be able to write them, and our Rabbis said that ten remained of them, for there is no small child who cannot write a small ‘yud.’”

Imported from an open dataset — not yet checked against the printed edition.