Luke 2:13

“And suddenly there was with the angel, etc.] That brought the tidings of Christ's birth to the shepherds: a multitude of the heavenly host: who being caused to fly swiftly, were at once with him, by his side, and about him; and which was a further confirmation of the truth of his message to them: these were angels who were called an host, or army, the militia of heaven, the ministers of God, that wait upon him, and do his pleasure; and are sent forth to minister to his people, and encamp about them, preserve, and defend them; (see <013201>Genesis 32:1,2) These are styled an heavenly host, because they dwell in heaven; and to distinguish them from hosts and armies on earth; and said to be a…”

“suddenly--as if only waiting till their fellow had done. with the angel--who retires not, but is joined by others, come to seal and to celebrate the tidings he has brought. heavenly host--or "army," an army celebrating peace! [BENGEL] "transferring the occupation of their exalted station to this poor earth, which so seldom resounds with the pure praise of God" [OLSHAUSEN]; to let it be known how this event is regarded in heaven and should be regarded on earth.”

“2:13 The armies of heaven reveal God’s sovereign power and authority (2 Kgs 6:17; Ps 148:2). “Lord of Heaven’s Armies” is a common Old Testament name for God (e.g., 1 Sam 1:11; 17:45; 2 Sam 7:8; Isa 5:16; Rom 9:29; Jas 5:4).”

“a multitude: Gen 28:12, Gen 32:1, Gen 32:2; Kg1 22:19; Job 38:7; Psa 68:17, Psa 103:20, Psa 103:21, Psa 148:2; Isa 6:2, Isa 6:3; Eze 3:12; Dan 7:10; Luk 15:10; Eph 3:10; Heb 1:14; Pe1 1:12; Rev 5:11 Luke 2:14”