Reading
Genesis 17: 1, 9- 10, 15- 22
17:1 In truth, after he began to be ninety-nine years of age, the Lord appeared to him. And he said to him: “I am the Almighty God. Walk in my sight and become complete.
17:9 Again God said to Abraham: “And you therefore shall keep my covenant, and your offspring after you in their generations.
17:10 This is my covenant, which you shall observe, between me and you, and your offspring after you: All the males among you shall be circumcised.
17:15 God said also to Abraham: “Your wife Sarai, you shall not call Sarai, but Sarah.
17:16 And I will bless her, and from her I will give you a son, whom I will bless, and he will be among the nations, and the kings of the peoples will rise from him.”
17:17 Abraham fell on his face, and he laughed, saying in his heart: “Do you think a son can be born to a one hundred year old man? And will Sarah give birth at the age of ninety?”
17:18 And he said to God, “If only Ishmael would live in your sight.”
17:19 And God said to Abraham: “Your wife Sarah shall give birth to a son, and you shall call his name Isaac, and I will establish my covenant with him as a perpetual covenant, and with his offspring after him.
17:20 Likewise, concerning Ishmael, I have heard you. Behold, I will bless and enlarge him, and I will multiply him greatly. He will produce twelve leaders, and I will make him into a great nation.
17:21 Yet in truth, I will establish my covenant with Isaac, to whom Sarah will give birth for you at this time next year.”
17:22 And when he had finished speaking with him, God ascended from Abraham.
Gospel
Matthew 8: 1- 4
8:1 And when he had descended from the mountain, great crowds followed him.
8:2 And behold, a leper, drawing near, adored him, saying, “Lord, if you are willing, you are able to cleanse me.”
8:3 And Jesus, extending his hand, touched him, saying: “I am willing. Be cleansed.” And immediately his leprosy was cleansed.
8:4 And Jesus said to him: “See to it that you tell no one. But go, show yourself to the priest, and offer the gift that Moses instructed, as a testimony for them.”