What does the Bible say about believer's baptism?

Believer's baptism is a New Testament ordinance instituted by Jesus Christ for individuals who have faith in Him. According to Acts 8:36-38, the only candidates for baptism are those who truly believe with all their heart that Jesus is the Son of God, as demonstrated by the Ethiopian eunuch's experience. This emphasizes that baptism is significant not for salvation but as a public declaration of faith. It symbolizes the believer's identification with Christ's death, burial, and resurrection, and is administered only to those who have been regenerated by the Holy Spirit.