Sabaoth (n.)

early 14c., from Late Latin, from Greek Sabaoth, rendering Hebrew tzebhaoth "hosts, armies," plural of tzabha "army," from tzaba "he waged war, he served." A word translated in English in the Old Testament by the phrase "Lord of Hosts," but originally left untranslated in the New Testament and in the "Te Deum" in the designation Lord of Sabaoth. Often confused with Sabbath.