'Hosts' in the Bible

So David waxed greater and greater: for the LORD of hosts was with him.

Now therefore thus shalt thou say unto my servant David, Thus saith the LORD of hosts, I took thee from the sheepcote, even from following the sheep, that thou shouldest be ruler over my people Israel:

Let it even be established, that thy name may be magnified for ever, saying, The LORD of hosts is the God of Israel, even a God to Israel: and let the house of David thy servant be established before thee.

When Tou king of Hamath heard how David had defeated all the army of Hadadezer king of Zobah,

of the sons of Perez is the head of all princes of the hosts for the first month.