Targum su Lamentazioni 5:5

Upon the bone of our necks we were laden when we went into exile. The wicked Nebuchadnezzar saw that the commanders of the Israelites were going without any load and he ordered that they sew Torah scrolls and make sacks out of them. And they filled them with pebbles from the edge of the Euphrates and they loaded them upon their necks. At that time we were tired and there was no rest for us.