mea culpa

mea culpa My fault, due to my error; my bad.
English mea culpa
through my fault
Text of the w:Tridentine Mass|Tridentine Mass:

Confiteor Deo omnipotenti, beatæ Mariæ semper Virgini, beato Michaeli Archangelo, beato Ioanni Baptistæ, sanctis Apostolis Petro et Paulo, omnibus Sanctis, et vobis, fratres: quia peccavi nimis cogitatione, verbo et opere: mea culpa, mea culpa, mea maxima culpa.

: I confess to the Almighty God, to the blessed Mary ever Virgin, to blessed Michael the Archangel, to blessed John the Baptist, to the holy Apostles Peter and Paul, to all the Saints, and to you brethren, that I have sinned exceedingly, in thought, word, and deed: through my fault, through my fault, through my most grievous fault.