This passage occurs in the Narrative Lectionary and the Revised Common Lectionary (Most recently All Saints Sunday, 2014).
I found this text fascinating though in terms of my understanding of a prophet. Elisha's actions in chapter 5 and 6 offer a different vision -- a very Christ like vision -- of what it means to be a prophet and perhaps too, for this Sunday, a saint.
נביה ("Niveah" meaning "prophet" (2 Kings 5:13)) Often times we think of prophets as those who either a) predict the future or b) bring down the judging word of God. In this case, the prophet also extends God's healing. In this sense, God offers a foreshadowing of John's baptizing people in the river Jordan. In fact, in chapter 6, the prophet Elisha saves lives and acts as a peace maker between Syria and Israel.
טהר ("tahar" meaning "cleanse, purify", 2 Kings 5:12, 13, 14) We saw this word back in Psalm 51. In Hebrew, this word is associated with pure metals (especially gold); it is often associated with ritual and ceremonial cleansing and furthermore, cleansed items used in worship. You could go a couple of ways here: First, that God's cleansing is like removal of dross from metal -- getting rid of the crap in our lives that we might be pure. Second, you could argue that the cleansing has a purpose (to be used in worship and service to God). Third, you could argue that ultimately forgiveness neats a ritual cleansing, including through washing with water or blood.
אראם ("aram" meaning "syrian" (2 Kings 5:1)) It is worth pointing out that ARAM is not a Jewish country. There are three vying kingdoms in the time of Elisha: Israel (Northern Kingdom, with its capital in Samaria), Judah (the Southern Kingdom, with its capital in Jerusalem) and Syria (with its capital in Damascus). They explicitly worship other gods and are routinely at war with the Israelites (and Judeans), as chapter 5 (see later in the passage too) makes clear. Given this reality...
* God still is soverign over their armies (2 Kings 5:1)
* God still is willing to hear their soliders - Namaan
* God is willing to forgive one of their army members for attending worship of another God because his job requires it. (2 Kings 5:18)