On the way to Jerusalem he was passing along between Samaria and Galilee.
As, on a former occasion, Matthew and the other two Evangelists (Matthew 8:1; Mark 1:40; Luke 5:12) related that a leper had been cleansed by Christ, so Luke mentions that the same miracle of healing was performed on ten lepers The object of this narrative, however, is different; for it describes the base and incredible ingratitude of the Jewish nation, to prevent us from wondering...
We have here an account of the cure of ten lepers, which we had not in any other of the evangelists. The leprosy was a disease which the Jews supposed to be inflicted for the punishment of some particular sin, and to be, more than other diseases, a mark of God's displeasure; and therefore Christ, who came to take away sin, and turn away wrath...
Commenting on Luke 17:11-19
And as he entered into a certain village,.... Whether in Samaria or Galilee, is not certain; perhaps it bordered on both, since there were both Jews and Samaritans in it, as appears by what follows; and since Christ was passing between both places: there met ten men that were lepers; who either were confined to this place, this village, for they might not be in...