How is the idea of confession used in the New Testament?
Leviticus 5:5 (ESV)
5when he realizes his guilt in any of these and confesses the sin he has committed,
In the New Testament the word confess is also used for confessing sin (1 John 1:9) as well as confessing the lordship of Jesus Christ (Romans 10:9–10). The acknowledgement of God’s truth lies behind both elements.
5 when he realizes his guilt in any of these and confesses the sin he has committed,