Bible Verses About Pardon: To those who confess their sins

Then Dauid sayde vnto Nathan, I haue sinned against the Lord. And Nathan sayde vnto Dauid, The Lord also hath put away thy sinne, thou shalt not die.

Then I acknowledged my sinne vnto thee, neither hid I mine iniquitie: for I thought, I will confesse against my selfe my wickednesse vnto the Lord, and thou forgauest the punishment of my sinne. Selah.

If we acknowledge our sinnes, he is faithfull and iust, to forgiue vs our sinnes, and to clense vs from all vnrighteousnes.