(13) Jesus, Master, have mercy on us.--The Greek word for "Master" is again that which has been noticed as St. Luke's usual equivalent for "Rabbi." (See Note on Luke 5:5.) We may believe that the earlier instance of leprosy being cleansed (Matthew 8:2), possibly many such instances (Matthew 11:5), had in some way come to their knowledge.

17:11-19 A sense of our spiritual leprosy should make us very humble whenever we draw near to Christ. It is enough to refer ourselves to the compassions of Christ, for they fail not. We may look for God to meet us with mercy, when we are found in the way of obedience. Only one of those who were healed returned to give thanks. It becomes us, like him, to be very humble in thanksgivings, as well as in prayers. Christ noticed the one who thus distinguished himself, he was a Samaritan. The others only got the outward cure, he alone got the spiritual blessing.And they lifted up their voices,.... Together, and cried aloud, being at a distance, that they might be heard; as well as to express their vehement desire, and great importunity to be cleansed; see Judges 9:7.

And said, Jesus, Master; or "Rabbi, Jesus", thou great Master in Israel; who art a teacher come from God, and who dost surprising miracles, and art able to cure us:

have mercy on us; and cleanse us from our leprosy; we believe thou art able, if thou wilt; show compassion to us, miserable objects, as they were; their faith was the same with that of the other leper, in Matthew 8:2.