10. As we learned, Rabbi Yitzchak said, What is meant by the verse, "On the mountains I will take up a weeping and wailing" (Yirmeyah 9:9)? The mountains that are referred to are the loftiest in the world. And who are these lofty mountains? They are "the precious sons of Zion comparable to fine gold." And now they are descending into exile with grindstones on their necks and their hands tied behind. And when they arrived in the exile of Babylon, they thought that they would never have support because the Holy One, blessed be He, had forsaken them and would no longer watch over them.