'Hosts' in the Bible

Now you also know what Joab the son of Zeruiah [my sister] did to me, and what he did to the two commanders of the armies of Israel, to Abner the son of Ner and to Amasa the son of Jether, [both of] whom he murdered; avenging the blood of war in [a time of] peace. And he put the [innocent] blood of war [of Abner and Amasa] on his belt that was around his waist, and on his sandals on his feet.

Elijah said, “As the Lord of hosts (armies) lives, before whom I stand, I will certainly show myself to Ahab today.”

He said, “I have been very zealous (impassioned) for the Lord God of hosts (armies) [proclaiming what is rightfully and uniquely His]; for the sons of Israel have abandoned (broken) Your covenant, torn down Your altars, and killed Your prophets with the sword. And I, only I, am left; and they seek to take away my life.”

He said, “I have been very zealous for the Lord God of hosts (armies), because the sons of Israel have abandoned (broken) Your covenant, torn down Your altars and killed Your prophets with the sword. And I, only I, am left; and they seek to take away my life.”