How do we know regeneration is a biblical concept?

The concept of regeneration is firmly rooted in Scripture, with direct references found in both the Old and New Testaments. In Matthew 19:28, Jesus refers to 'the regeneration' as a specific event tied to His resurrection, showing that the term has a biblically defined meaning. Additionally, Titus 3:5 speaks of God saving us 'by the washing of regeneration and renewal of the Holy Spirit.' Both instances illustrate that regeneration is not merely a theological construct but a defined biblical truth that emphasizes God's sovereign work in salvation. The fact that the term appears in limited locations further signifies its specific and significant place in the broader narrative of Scripture, reinforcing its validity.