One of the names of God in the Old Testament is the Lord of Hosts. Hosts here translates "armies". The Lord commands ministering spirits for His children. We see this in 2 Kings chapter 6 which records the story of Elisha and his servant being surrounded by the vast Syrian army.
2Kings 6:15-17 [And Elisha’s servant] said to Elisha, Oh, Master, what will we do now? And Elisha answered, Fear not: for there are more on our side than those who are against us. And Elisha prayed, Open his eyes, LORD, so that he may see. Then the LORD opened the servant’s eyes, and he looked and saw the hills full of horses and chariots of fire all around Elisha.