the LORD of hosts = Jehovah Zebbaioth, the first of thirtynine occurrences of this title in Jeremiah (Jer_6:6, Jer_6:9; Jer_8:3; Jer_9:7, Jer_9:17; Jer_10:16; Jer_11:17, Jer_11:20, Jer_11:22; Jer_19:11; Jer_20:12; Jer_23:15, &c.)
cast a mount = pour out: i.e. the earth from baskets to make a mount.