1 Chronicles 21:8

And David said unto Nathan, I have sinned against the Lord. And Nathan said unto David, The Lord also hath put away thy sin; thou shalt not die.

If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness.

And Samuel said to Saul, Thou hast done foolishly: thou hast not kept the commandment of the Lord thy God, which he commanded thee: for now would the Lord have established thy kingdom upon Israel for ever.

Then said Saul, I have sinned: return, my son David: for I will no more do thee harm, because my soul was precious in thine eyes this day: behold, I have played the fool, and have erred exceedingly.

And he said unto them, What advice give ye that we may return answer to this people, which have spoken to me, saying, Ease somewhat the yoke that thy father did put upon us?

And I, whither shall I cause my shame to go? and as for thee, thou shalt be as one of the fools in Israel. Now therefore, I pray thee, speak unto the king; for he will not withhold me from thee.

And David’s heart smote him after that he had numbered the people. And David said unto the Lord, I have sinned greatly in that I have done: and now, I beseech thee, O Lord, take away the iniquity of thy servant; for I have done very foolishly.

And the sons of Jacob came out of the field when they heard it: and the men were grieved, and they were very wroth, because he had wrought folly in Israel in lying with Jacob’s daughter; which thing ought not to be done.

Take with you words, and turn to the Lord: say unto him, Take away all iniquity, and receive us graciously: so will we render the calves of our lips.

Only acknowledge thine iniquity, that thou hast transgressed against the Lord thy God, and hast scattered thy ways to the strangers under every green tree, and ye have not obeyed my voice, saith the Lord.

The next day John seeth Jesus coming unto him, and saith, Behold the Lamb of God, which taketh away the sin of the world.

I will arise and go to my father, and will say unto him, Father, I have sinned against heaven, and before thee, And am no more worthy to be called thy son: make me as one of thy hired servants.

For thy name’s sake, O Lord, pardon mine iniquity; for it is great.

I acknowledged 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.

Have mercy upon me, O God, according to thy lovingkindness: according unto the multitude of thy tender mercies blot out my transgressions. Wash me throughly from mine iniquity, and cleanse me from my sin. For I acknowledge my transgressions: and my sin is ever before me.