I pray, O eternal! I have done wrong, I have transgressed, I have sinned before Thee, both I and my house; I pray. O eternal! Forgive, I pray, the iniquities, and the transgressions, and the sins, which I have wrongly committed, and which I have transgressed, and which I have sinned before thee, both I and my house, as it is written in the Law of Moses, Thy servant, For on this day shall atonement be made for you to cleanse you; from all your sins you shall be clean before the Lord.
This prayer was said by Israel's High Priest as part of the Day of Atonement prayers.
Articles of interest include include:
(Yoma 3:8) The Fall Feasts of Israel p.99 by Mitch and Zhava Glaser.