'Confession' in the Bible

Now while Ezra prayed and made confession, weeping and casting himself down before the house of God, there was gathered together unto him out of Israel a very great assembly of men and women and children; for the people wept very sore.

Now therefore make confession unto Jehovah, the God of your fathers, and do his pleasure; and separate yourselves from the peoples of the land, and from the foreign women.