2 Kings 6:17-18

17Then Elisha prayed and said, “O Lord, please aopen his eyes that he may see.” So the Lord opened the eyes of the young man, and he saw, and behold, the mountain was full of bhorses and chariots of fire all around Elisha. 18And when the Syrians came down against him, Elisha prayed to the Lord and said, “Please strike this people with blindness.” cSo he struck them with blindness in accordance with the prayer of Elisha.
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