What does the Bible say about confession of sins?

In 1 John 1:9, it says, 'If we confess our sins, He is faithful and just to forgive us our sins and to cleanse us from all unrighteousness.' Confession is not for God’s benefit; rather, it serves to remind us of our continual need for His grace and forgiveness. By confessing our sins, we affirm our understanding of the gravity of sin and the necessity of Christ's sacrifice for our salvation. Our confession becomes a means through which we acknowledge the righteous action of God in forgiving us due to the finished work of Christ.