“And Elisha prayed, and said, LORD, I pray thee, open his eyes, that he may see. And the LORD opened the eyes of the young man; and he saw: and, behold, the mountain was full of horses and chariots of fire round about Elisha.”
King James Version (KJV)
6:17 He saw, &c. - Fire is both dreadful and devouring: that power which was engaged for Elisha, could both terrify and consume the assailants. Elijah gave a specimen of Divine justice, when he called for flames of fire on the heads of his persecutors to consume them. Elisha gives a specimen of Divine mercy, in heaping coals of fire on the heads of his persecutors to melt them.