Verses with the word confess in the Old Testament (11 verses):

Leviticus 5:5
And it shall be, when he shall be guilty in one of these things, that he shall confess that he hath sinned in that thing:

Leviticus 16:21
And Aaron shall lay both his hands upon the head of the live goat, and confess over him all the iniquities of the children of Israel, and all their transgressions in all their sins, putting them upon the head of the goat, and shall send him away by the hand of a fit man into the wilderness:

Leviticus 26:40
If they shall confess their iniquity, and the iniquity of their fathers, with their trespass which they trespassed against me, and that also they have walked contrary unto me;

Numbers 5:7
Then they shall confess their sin which they have done: and he shall recompense his trespass with the principal thereof, and add unto it the fifth part thereof, and give it unto him against whom he hath trespassed.

1 Kings 8:33
When thy people Israel be smitten down before the enemy, because they have sinned against thee, and shall turn again to thee, and confess thy name, and pray, and make supplication unto thee in this house:

1 Kings 8:35
When heaven is shut up, and there is no rain, because they have sinned against thee; if they pray toward this place, and confess thy name, and turn from their sin, when thou afflictest them:

2 Chronicles 6:24
And if thy people Israel be put to the worse before the enemy, because they have sinned against thee; and shall return and confess thy name, and pray and make supplication before thee in this house;

2 Chronicles 6:26
When the heaven is shut up, and there is no rain, because they have sinned against thee; yet if they pray toward this place, and confess thy name, and turn from their sin, when thou dost afflict them;

Nehemiah 1:6
Let thine ear now be attentive, and thine eyes open, that thou mayest hear the prayer of thy servant, which I pray before thee now, day and night, for the children of Israel thy servants, and confess the sins of the children of Israel, which we have sinned against thee: both I and my father's house have sinned.

Job 40:14
Then will I also confess unto thee that thine own right hand can save thee.

Psalms 32:5
I acknowledge my sin unto thee, and mine iniquity have I not hid. I said, I will confess my transgressions unto the LORD; and thou forgavest the iniquity of my sin. Selah.