Almighty and everlasting God, who art always more ready to hear than we to pray, and art wont to give more than either we desire or deserve; Pour down upon us the abundance of thy mercy; forgiving us those things whereof our conscience is afraid, and giving us those good things which we are not worthy to ask, but through the merits and mediation of Jesus Christ, thy Son, our Lord. Amen.
— Leo the Great, Reigned 440-461
John 17:1-5 NRSV
After Jesus had spoken these words, he looked up to heaven and said, “Father, the hour has come; glorify your Son so that the Son may glorify you, since you have given him authority over all people, to give eternal life to all whom you have given him. And this is eternal life, that they may know you, the only true God, and Jesus Christ whom you have sent. I glorified you on earth by finishing the work that you gave me to do. So now, Father, glorify me in your own presence with the glory that I had in your presence before the world existed.”
It is proper and right to sing to You, bless You, praise You, thank You and worship You in all places of Your dominion; for You are God ineffable, beyond comprehension, invisible, beyond understanding, existing forever and always the same; You and Your only begotten Son and Your Holy Spirit. You brought us into being out of nothing, and when we fell, You raised us up again. You did not cease doing everything until You led us to heaven and granted us Your kingdom to come. For all these things we thank You and Your only begotten Son and Your Holy Spirit; for all things that we know and do not know, for blessings seen and unseen that have been bestowed upon us. We also thank You for this liturgy which You are pleased to accept from our hands, even though You are surrounded by thousands of Archangels and tens of thousands of Angels, by the Cherubim and Seraphim, six-winged, many-eyed, soaring with their wings, Singing the victory hymn, proclaiming, crying out, and saying: Holy, holy, holy, Lord Sabaoth, heaven and earth are filled with Your glory. Hosanna in the highest. Blessed is He who comes in the name of the Lord. Hosanna to God in the highest.
— John Chrysostom, The Divine Liturgy