Book of Genesis - 17,1.9-10.15-22.

When Abram was ninety-nine years old, the LORD appeared to him and said: "I am God the Almighty. Walk in my presence and be blameless.
God also said to Abraham: "On your part, you and your descendants after you must keep my covenant throughout the ages.
This is my covenant with you and your descendants after you that you must keep: every male among you shall be circumcised.
God further said to Abraham: "As for your wife Sarai, do not call her Sarai; her name shall be Sarah.
I will bless her, and I will give you a son by her. Him also will I bless; he shall give rise to nations, and rulers of peoples shall issue from him."
Abraham prostrated himself and laughed as he said to himself, "Can a child be born to a man who is a hundred years old? Or can Sarah give birth at ninety?"
Then Abraham said to God, "Let but Ishmael live on by your favor!"
God replied: "Nevertheless, your wife Sarah is to bear you a son, and you shall call him Isaac. I will maintain my covenant with him as an everlasting pact, to be his God and the God of his descendants after him.
As for Ishmael, I am heeding you: I hereby bless him. I will make him fertile and will multiply him exceedingly. He shall become the father of twelve chieftains, and I will make of him a great nation.
But my covenant I will maintain with Isaac, whom Sarah shall bear to you by this time next year."
When he had finished speaking with him, God departed from Abraham.

Psalms - 128(127),1-2.3.4-5.

Blessed are you who fear the LORD,
who walk in his ways!
For you shall eat the fruit of your handiwork;
blessed shall you be, and favored.
Your wife shall be like a fruitful vine
in the recesses of your home;
Your children like olive plants
around your table.
Behold, thus is the man blessed
who fears the LORD.
The LORD bless you from Zion:
may you see the prosperity of Jerusalem
all the days of your life.

Holy Gospel of Jesus Christ according to Saint Matthew - 8,1-4.

When Jesus came down from the mountain, great crowds followed him.
And then a leper approached, did him homage, and said, "Lord, if you wish, you can make me clean."
He stretched out his hand, touched him, and said, "I will do it. Be made clean." His leprosy was cleansed immediately.
Then Jesus said to him, "See that you tell no one, but go show yourself to the priest, and offer the gift that Moses prescribed; that will be proof for them."

St. William of Vercelli (of Monte-Vergine) (Abbot (+ 1142))

St. Prosper of Aquitaine (5th century)

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Category: Mass by Year / Catholic Missal 2021 / Catholic Missal of june 2021