'We Have Sinned' in the Bible

let Thine ear be, I pray Thee, attentive, and Thine eyes open, to hearken unto the prayer of Thy servant, that I am praying before Thee to-day, by day and by night, concerning the sons of Israel Thy servants, and confessing concerning the sins of the sons of Israel, that we have sinned against Thee; yea, I and the house of my father have sinned;