What sins? The Lord Jesus Christ died for them-1 Cor. 15:1-4 KJV
"In whom we have redemption through his blood, the forgiveness of sins(all sins past and future), according to the riches of his grace;" Eph. 1:7 KJV
"And be ye kind one to another, tenderhearted, forgiving one another, even as God for Christ's sake hath forgiven you.(all sins past and future)" Eph. 4:32 KJV
"And be ye kind one to another, tenderhearted, forgiving one another, even as God for Christ's sake hath forgiven you.(all sins past and future)'" Col. 1:14 KJV
"And you, being dead in your sins and the uncircumcision of your flesh, hath he quickened together with him, having forgiven you all trespasses;(all sins past and future)"- Col. 2:13 KJV
"Forbearing one another, and forgiving one another, if any man have a quarrel against any: even as Christ forgave you(all sins past and future), so also do ye." Col. 3:13 KJV
What sin? Unlike sins,plural, sin, singular cannot be forgiven-it must be judged/condemned. And it was:
Romans 8:3 KJV For what the law could not do, in that it was weak through the flesh, God sending his own Son in the likeness of sinful flesh, and for sin(singular-my note), condemned sin(singular-my note) in the flesh: