The Roman Missal: Proper of Saints, March and April (English) 19
1[April 11. St Leo the Great, Pope, Confessor, and Doctor.—Double.]
2Introit. Ecclus. xv. In the midst of the Church the Lord opened his mouth: and filled him with the spirit of wisdom and understanding: he clothed him with a robe of glory. Ps. It is good to give praise to the Lord; and to sing to thy name, O Most High. Glory, &c.
3Prayer. Exaudi quæsumus. Graciously hear our prayers, O Lord, we beseech thee, which we offer in the solemn commemoration of blessed Leo, thy confessor and bishop; and absolve us from all sins by the merits of him who served thee worthily, interceding for us. Through our Lord, &c.
4Lesson. Ecclus. xxxix. 6—14. The just man will give his heart to resort early to the Lord that made him, and he will pray in the sight of the Most High. He will open his mouth in prayer, and will make supplication for his sins. For if it shall please the great Lord, he will fill him with the spirit of understanding; and he will pour forth the words of his wisdom as showers, and in his prayers he will confess to the Lord; and he shall direct his counsel, and his knowledge, and in his secrets shall he meditate. He shall shew forth the discipline he hath learned, and shall glory in the law of the covenant of the Lord. Many shall praise his wisdom, and it shall never be forgotten. The memory of him shall not depart away, and his name shall be in request from generation to generation. Nations shall declare his wisdom, and the Church shall shew forth his praise.
5Gradual. The mouth of the just shall meditate wisdom, and his tongue shall speak judgment.—The law of his God is in his heart: and his steps shall not be supplanted.
6Tract. Blessed is the man that feareth the Lord: he delighteth exceedingly in his commandments.—His seed shall be mighty upon earth: the generation of the righteous shall be blessed.—Glory and wealth shall be in his house: and his justice remaineth for ever and ever.
8Alleluia, alleluia.—The Lord loved him, and adorned him: he clothed him with a robe of glory. Alleluia.—The just shall spring as the lily; and shall flourish for ever before the Lord. Alleluia.
10Offertory. I have found David my servant: with my holy oil I have anointed him: for my hand shall help him, and my arm shall strengthen him.
11Secret. We beseech thee, O Lord, that the annual solemnity of holy Leo, thy confessor and bishop, may render us acceptable to thy mercy; that by these offices of pious expiation, while a blessed reward attends him, he may procure for us the gifts of thy grace. Through our Lord, &c.
12Communion. Blessed is the servant, whom when his lord shall come, he shall find watching: amen I say to you, he shall set him over all his goods.
13Postcom. Deus fidelium. O God, the rewarder of faithful souls, grant that we may obtain pardon by the prayers of blessed Leo, thy confessor and bishop, whose venerable festival we celebrate. Through our Lord, &c.
My LORD’s Bible