The king of Aram had high admiration for Naaman, the commander of his army, because through him the LORD had given Aram great victories. But though Naaman was a mighty warrior, he suffered from leprosy.
References for 2 Kings 5:1
Now groups of Aramean raiders had invaded the land of Israel, and among their captives was a young girl who had been given to Naaman's wife as a maid.
One day the girl said to her mistress, "I wish my master would go to see the prophet in Samaria. He would heal him of his leprosy."
So Naaman told the king what the young girl from Israel had said.
"Go and visit the prophet," the king told him. "I will send a letter of introduction for you to carry to the king of Israel." So Naaman started out, taking as gifts 750 pounds of silver, 150 pounds of gold, and ten sets of clothing.
References for 2 Kings 5:5
The letter to the king of Israel said: "With this letter I present my servant Naaman. I want you to heal him of his leprosy."