Luke 17:12

δέκα λεπροὶ ἄνδρες. So in 2 Kings 7:3 we find four lepers together. The one Samaritan would not have been allowed to associate with the nine Jews had not leprosy obliterated religious distinctions, as it still sadly does in the leper-houses (Biut el Masakin, ‘Abodes of the Unfortunate’) at Jerusalem, where alone Jews and Mahometans will live together.

πόρρωθεν. As the Law required, Leviticus 13:45-46. See on Luke 5:12. Usually they stood at the roadside, as they still do, clamorously demanding alms, but they had heard the fame of Jesus, and asked from Him a vaster benefit. The leper of Luke 5:12 was exceptionally bold.