Mark 16:15-16 BSB
15And He said to them, “Go into all the world and preach the gospel to every creature. 16Whoever believes and is baptized will be saved, but whoever does not believe will be condemned.
https://biblehub.com/mark/16-15.htm
Study Bible
What Does Mark 16:16 Mean
but whoever does not believe
• Unbelief, not lack of baptism, is singled out as the decisive issue (John 3:18; Hebrews 3:19).
• This clarifies that baptism, though commanded, does not replace faith; rejecting Christ nullifies any outward ritual.