There are many verses in the Bible that mention baptism:

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• Mark 16:16 - Baptism is necessary for salvation,
• Acts 2:38 - Baptism is for the forgiveness of sins,
• Gal 3:27 - Baptism clothes us with Christ,
• Romans 6:3-4 - Baptism puts us in Christ,
• 1 Peter 3:21 - Baptism saves us.

Baptism is necessary for one to be in Christ, receive grace, be saved and be added to the church.