Canticle 9, The First Song of Isaiah (Ecce, Deus) is a version of Biblical text found in The Book of the Prophet Isaiah 12:2-6. Canticle 9 can be found on page 86 of The Book of Common Prayer. When you read the Canticles regularly, they jump off the page when you read them in the Bible and vice versa!
Surely, it is God who saves me; *
I will trust in him and not be afraid.
For the Lord is my stronghold and my sure defense, *
and he will be my Savior.
Therefore you shall draw water with rejoicing *
from the springs of salvation.
And on that day you shall say, *
Give thanks to the Lord and call upon his Name;
Make his deeds known among the peoples; *
see that they remember that his Name is exalted.
Sing the praises of the Lord, for he has done great things, *
and this is known in all the world.
Cry aloud, inhabitants of Zion, ring out your joy, *
for the great one in the midst of you is the Holy One of Israel.
Glory to the Father, and to the Son, and to the Holy Spirit: *
as it was in the beginning, is now, and will be for ever. Amen.