Luke 17:19

And He said unto him, Arise, go thy way: thy faith. Faith, by which you have believed that I am able to save you, nay that I will do so, if you obey Me, and go to the priests. For this faith has worked with your healing, even though I be the primary author. Hence very likely the prompting of God elicited from this leper some act of contrition by which he was justified; and that he then left the schism of the Samaritans, and joined the true religion of the Jews. In the end he became a disciple of Jesus, and received His baptism, and became a Christian and preached the power and miracle of Christ and converted many to Him.