I have always loved the story of Naaman the Syrian, which is found in the second book of Kings, as part of the Elisha cycle of readings. It is, on the surface at least, a very simple narrative, but it packs a punch spiritually speaking.
Mass Readings
Reading 1 – 2 Kings 5:14-17
Psalm – Psalms 98:1-4
Reading 2 – 2 Timothy 2:8-13
Gospel – Luke 17:11-19