Heavenly host (Hebrew: צבאות sabaoth, "armies") refers to the army (Luke 2:13) of angels mentioned both in the Hebrew and Christian Bibles, as well as other Jewish and Christian texts.
Several descriptions of angels in the Bible describe them in military terms, such as encampment (Genesis 32:1-2), command structure (Psalms 91:11-12; Matt.13:41; Rev.7:2), and combat (Jdg.5:20; Job 19:12; Rev.12:7). The heavenly host participate in the War in Heaven.
In the Book of Joshua 5:13-15, Joshua encounters a "captain of the host of the Lord" in the early days of his campaigns in the Promised Land. This unnamed heavenly messenger is sent by God to encourage Joshua in the upcoming claiming of the Promised Land:
Once when Joshua was near Jericho, he looked up and saw a man standing before him with a drawn sword in his hand. Joshua went to him and said to him, ‘Are you one of us, or one of our adversaries?’ He replied, ‘Neither; but as commander of the army of the Lord I have now come.’ And Joshua fell on his face to the earth and worshiped, and he said to him, ‘What do you command your servant, my Lord?’ The commander of the army of the Lord said to Joshua, ‘Remove the sandals from your feet, for the place where you stand is holy.’ And Joshua did so.
Cherubim are depicted as accompanying God's chariot-throne (Ps.80:1). Exodus 25:18-22 refers to statues of two cherubim placed on top of the Ark of the Covenant. J. A. Motyer writes: 'the cherbim overshadowing the ark were a pedestal for the invisible throne of the invisible God'. Other guard-like duties include being posted in locations such as the gates of Eden (Gen.3:24). Cherubim were mythological winged bulls or other beasts that were part of ancient Near Eastern traditions.