20. from … north—Nebuchadnezzar and his hostile army (Jer 1:14; 6:22).
flock … given thee—Jeremiah, amazed at the depopulation caused by Nebuchadnezzar's forces, addresses Jerusalem (a noun of multitude, which accounts for the blending of plural and singular, Your eyes … thee … thy flock), and asks where is the population (Jer 13:17, "flock") which God had given her?