Matthew 11:25; Psalm 71:5b [Latin: Matthaeus 11:25; Psalmi 70:5b] – I confess to Thee [“I thank thee” in some translations], O Father, Lord of heaven and earth, because Thou hast hid these things from the wise and prudent and hast revealed them to little ones.
My hope, O Lord, from my youth.
CONFÍTEOR tibi, Pater, Dómine cœli et terræ, quia abscondísti hæc a sapiéntibus, et prudéntibus, et revelasti ea párvulis. Dómine, spes mea a juventúte mea.
Gradual: Confiteor tibi, Pater, chant from Graduale Romanum, Solesmes, 1961, p. 613, or The Liber Usualis, Solesmes, 1961, p. 1668, and sung in Extraordinary Form of the Mass for October 3rd, during Feast of Saint Teresa of the Child Jesus
Free sheet music at GregoBase