Trinity Sunday Collect

Let us Pray
to our God who is Father, Son, and Holy Spirit:
God, we praise You:
Father all-powerful,
Christ Lord and Savior,
Spirit of Love.
You reveal Yourself in the depths of our being,
drawing us to share in Your life and Your love.
One God, three Persons,
be near to the people formed in Your image,
close to the World Your love brings to life.
We ask You this, Father, Son and Holy Spirit,
one God, true and living, forever and ever.
Amen.
 

[Roman Catholic]

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Thrice-Holy Prayer

+Holy God, Holy Mighty, Holy Immortal,
have mercy on us.
(3 times or chanted repeatedly.)
 

[a/k/a Trisagion Prayer (short version)]
[Eastern Orthodox]