Having met the Savior, therefore, the lepers earnestly besought Him to free them from their misery, and called Him Master, that is. Teacher. No one pitied them when suffering this malady, but He Who had appeared on earth for this very reason, and had become man that He might show pity to all, He was moved with compassion for them, and had mercy on them.
-St. Cyril of Alexandria, Commentary on the Gospel of St. Luke, Homilies 113-116. B#42, pp. 465-466, 4th Century


And why did He not rather say, I will, be you cleansed; as He did in the case of another leper, but commanded them rather to show themselves to the priests? It was because the law gave directions to this effect to those who were delivered from leprosy (Lev. 14-2); for it commanded them to show themselves to the priests, and to offer a sacrifice for their cleansing.
-St. Cyril of Alexandria, Commentary on the Gospel of St. Luke, Homilies 113-116. B#42, pp. 465-466, 4th Century