Prayer to the Most Holy Trinity

O Most-Holy Trinity, Have Mercy On Us. O Lord, Blot Out Our Sins. O Master, Pardon Our Iniquities. O Holy One, Visit And Heal Our Infirmities For Thy Name’s Sake. 

Most holy — holy in the highest degree; Trinity — the three Persons of God, God the Father, God the Son, and God the Holy Spirit; sins and iniquities — our deeds that are against the will of God; heal — make well; infirmities — weaknesses, sins; for Thy name’s sake — for the glorification of Thy name. 

This prayer is a prayer of petition. In it we turn first to all the three Persons together, and then to each Person of the Trinity separately: to God the Father, that He might cleanse our sins; to God the Son, that He might forgive our iniquities; to God the Holy Spirit that He might visit and heal our infirmities. The words: for Thy name’s sake again apply to all three Persons of the Holy Trinity together, and just as God is One, so also His name is one, and therefore we say "for Thy name’s sake" and not "for Thy names’ sakes."

Law of God Archpriest Seraphim Slobodskoy