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AI-generated illustration: an open Lectionary on a carved ambo before an altar with white linen, candles and a crucifix, morning light through stained glass. Classical sacred-art style.

Readings of the day

Saint Leo the Great, Pope and Doctor of the ChurchMemorial

Sunday cycle B · Weekday cycle I

Texts from World English Bible (Catholic) (WEB-C); the official lectionary translation in your country may differ.

Mass during the Day

  1. First reading Wisdom of Solomon 6:1-11

    1Hear therefore, you kings, and understand. Learn, you judges of the ends of the earth. 2Give ear, you rulers who have dominion over many people, and make your boast in multitudes of nations, 3because your dominion was given to you from the Lord, and your sovereignty from the Most High. He will search out your works, and will inquire about your plans, 4because being officers of his kingdom, you didn’t judge rightly, nor did you keep the law, nor did you walk according to God’s counsel. 5He will come upon you awfully and swiftly, because a stern judgment comes on those who are in high places. 6For the man of low estate may be pardoned in mercy, but mighty men will be mightily tested. 7For the Sovereign Lord of all will not be impressed with anyone, neither will he show deference to greatness; because it is he who made both small and great, and cares about them all; 8but the scrutiny that comes upon the powerful is strict. 9Therefore, my words are to you, O princes, that you may learn wisdom and not fall away. 10For those who have kept the things that are holy in holiness will be made holy. Those who have been taught them will find what to say in defense. 11Therefore set your desire on my words. Long for them, and you princes will be instructed.

    WEB-C · World English Bible (Catholic). Public Domain. Source: eBible.org. Read in context

  2. Responsorial Psalm Psalms 82:3-4, 6-7

    3“Defend the weak, the poor, and the fatherless. Maintain the rights of the poor and oppressed. 4Rescue the weak and needy. Deliver them out of the hand of the wicked.” 6I said, “You are gods, all of you are sons of the Most High. 7Nevertheless you shall die like men, and fall like one of the rulers.”

    WEB-C · World English Bible (Catholic). Public Domain. Source: eBible.org. Read in context

  3. Gospel acclamation 1 Thessalonians 5:18

  4. Gospel Luke 17:11-19

    11As he was on his way to Jerusalem, he was passing along the borders of Samaria and Galilee. 12As he entered into a certain village, ten men who were lepers met him, who stood at a distance. 13They lifted up their voices, saying, “Jesus, Master, have mercy on us!” 14When he saw them, he said to them, “Go and show yourselves to the priests.” As they went, they were cleansed. 15One of them, when he saw that he was healed, turned back, glorifying God with a loud voice. 16He fell on his face at Jesus’ feet, giving him thanks; and he was a Samaritan. 17Jesus answered, “Weren’t the ten cleansed? But where are the nine? 18Were there none found who returned to give glory to God, except this foreigner?” 19Then he said to him, “Get up, and go your way. Your faith has healed you.”

    WEB-C · World English Bible (Catholic). Public Domain. Source: eBible.org. Read in context

Proper readings of the memorial (optional)

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  1. First reading Sirach 39:6-11

    6If the great Lord wills, he will be filled with the spirit of understanding; he will pour forth the words of his wisdom and in prayer give thanks to the Lord. 7He will direct his counsel and knowledge, and he will meditate in his secrets. 8He will show the instruction which he has been taught and will glory in the law of the covenant of the Lord. 9Many will commend his understanding. So long as the world endures, it won’t be blotted out. His memory won’t depart. His name will live from generation to generation. 10Nations will declare his wisdom. The congregation will proclaim his praise. 11If he continues, he will leave a greater name than a thousand. If he finally rests, it is enough for him.

    WEB-C · World English Bible (Catholic). Public Domain. Source: eBible.org. Read in context

  2. Responsorial Psalm Psalms 37:3-4, 5-6, 30-31

    3Trust in the LORD, and do good. Dwell in the land, and enjoy safe pasture. 4Also delight yourself in the LORD, and he will give you the desires of your heart. 5Commit your way to the LORD. Trust also in him, and he will do this: 6he will make your righteousness shine out like light, and your justice as the noon day sun. 30The mouth of the righteous talks of wisdom. His tongue speaks justice. 31The law of his God is in his heart. None of his steps shall slide.

    WEB-C · World English Bible (Catholic). Public Domain. Source: eBible.org. Read in context

  3. Gospel acclamation Mark 1:17

  4. Gospel Matthew 16:13-19

    13Now when Jesus came into the parts of Caesarea Philippi, he asked his disciples, saying, “Who do men say that I, the Son of Man, am?” 14They said, “Some say John the Baptizer, some, Elijah, and others, Jeremiah or one of the prophets.” 15He said to them, “But who do you say that I am?” 16Simon Peter answered, “You are the Christ, the Son of the living God.” 17Jesus answered him, “Blessed are you, Simon Bar Jonah, for flesh and blood has not revealed this to you, but my Father who is in heaven. 18I also tell you that you are Peter, and on this rock I will build my assembly, and the gates of Hades will not prevail against it. 19I will give to you the keys of the Kingdom of Heaven, and whatever you bind on earth will have been bound in heaven; and whatever you release on earth will have been released in heaven.”

    WEB-C · World English Bible (Catholic). Public Domain. Source: eBible.org. Read in context

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General Roman Calendar. National calendars (for example Epiphany or Ascension on a Sunday) may have other readings.

References: Ordo Lectionum Missae, editio typica altera (Libreria Editrice Vaticana, 1981). The psalm response is not shown.