This hymn of praise to the eternal Trinity is the  official prayer of the Order of the Blessed Trinity.
For centuries the Trinitarians and those affiliated with them have united themselves to the nine
choirs of Angles in praising the Trinity.

This chaplet consists of three sets of nine small beads, each set being separated with a large one.

In the name of the Father, and of the Son, and of the Holy Spirit. Amen.

V. O Lord, Thou wilt open my lips.
R. Any my mouth shall declare Thy praise.
V. O God, come to my assistance.
R. O Lord, make haste to help me.
V. Glory be to the Father, and to the Son and to the Holy Spirit.
R. As it was in the beginning, is now, and ever shall be, world without end. Amen.

V. Holy God, Holy Strong One, Holy Immortal One.
R.  Have mercy on us.  Our Father, etc.

Then repeat nine times:
V.  To Thee be praised, to Thee be glory, to Thee be thanksgiving through endless ages.  O Blessed Trinity.
R. Holy, Holy, Holy Lord God of Host: the heavens and the earth are full of Thy Glory.

When completed, recite:
V. Glory be to the Father and to the Son and to the Holy Spirit.
R. As it was in the beginning, is now, and ever shall be, world without end. Amen.

The second and third set will be said in the same way beginning with Holy God, Holy Strong One, etc.

When the third set is completed, recite the following:
Ant.  With all our heart and voice, we acknowledge, we praise and we bless Thee, God
the Father unbegotten: Thee the only begotten Son; Thee the Holy Spirit the Paraclete, O holy
and undivided Trinity. To Thee be honor and glory forever.

V. Let us bless the Father, the Son and the Holy Spirit.
R. Let us praise and exalt Him above all for ever.

Let us Pray.
Almighty and everlasting God, who hast given unto us, Thy servants, grace by the confession of the true faith to acknowledge the glory of the eternal Trinity, and in the  power of Thy divine Majesty to worship  the Unity; we beseech Thee, that by our  steadfastness in; this same faith, we may ever more be defended from all adversities. Through Christ our Lord. Amen

Invocation
Deliver us, save us, vivify us, O blessed Trinity.