2 Kings 6:16

But, as many delight in warfare, which is the most glorious, to bring a battle to an end by the strength of a great army or by merits before God alone? Elisha rested in one place while the king of Syria waged a great war against the people of our ancestors, and was adding to its terrors by various treacherous plans and was endeavoring to catch them in an ambush. But the prophet found out all their preparations, and being by the grace of God present everywhere in mental vigor, he told the thoughts of their enemies to his countrymen and warned them of what places to beware. And when this was known to the king of Syria, he sent an army and shut in the prophet. Elisha prayed and caused all of them to be struck with blindness and made those who had come to besiege him enter Samaria as captives.

Elsewhere, also, that is, in the books of Kings we read that Elisha was in Samaria, and suddenly an army of Syrians surrounded and set on him. Gehazi saw them and said to his master, "O master, what shall we do?" And Elisha the prophet said, "Do not fear, for there are more with us than with them." And he prayed that the Lord would open the eyes of Gehazi. And his eyes were opened, and he saw the mountain full of horses and chariots around Elisha. And Elisha prayed that God would strike them with blindness. And they were struck, and they entered into the city whither they were going, seeing not at all. Surely, you soldiers who have been surrounded have heard that where there is perfidy, there is blindness. Rightly, therefore, was the army of the unbeliever blind. But where there is faith, there is an army of angels. Good, then, is faith, which often exercises its power among the dead. Hence our adversary [the devil] and his legions are daily hurled back by the virtue of the martyrs.

If, then, justice is binding, even in war, how much more ought we to observe it in time of peace. Such favor the prophet showed to those who came to seize him. We read that the king of Syria had sent his army to lie in wait for him, for he had learned that it was Elisha who had made known to all his plans and consultations. And Gehazi, the prophet's servant, seeing the army, began to fear that his life was in danger. But the prophet said to him, "Do not fear, for they who are with us are more than they who are with them." And when the prophet asked that the eyes of his servant might be opened, they were opened. Then Gehazi saw the whole mountain full of horse and chariots round about Elisha. As they came down to him the prophet says, "Strike, O God, the army of Syria with blindness." And this prayer being granted, he says to the Syrians, "Follow me, and I will bring you to the man whom you seek." Then they saw Elisha, whom they were endeavoring to lay hold of, and seeing him they could not hold him fast. It is clear from this that faith and justice should be observed even in war; and that it could not but be a disgraceful thing if faith were violated.