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.(Psa 32:5)

For I will declare mine iniquity; I will be sorry for my sin. (Psa 38:18)

He that covereth his sins shall not prosper: but whoso confesseth and forsaketh them shall have mercy. (Pro 28:13)

If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness. (1Jn 1:9)

For I will be merciful to their unrighteousness, and their sins and their iniquities will I remember no more. (Heb 8:12)