Are Naaman's actions considered an exception to God's laws in 2 Kings 5:18–19?

In 2 Kings 5:18–19, we read about Naaman, a commander of the Syrian army who was healed of his leprosy by Elisha, the prophet of God. After being healed, Naaman expressed his gratitude to Elisha and offered him a gift, which Elisha refused. Naaman then asked for some