Charles Ellicott Commentary Luke 17:13

"and they lifted up their voices, saying, Jesus, Master, have mercy on us." — Luke 17:13 (ASV)

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.