Some people were asking me about baptism weeks ago on FB and whether or not it is salvific. No, water baptism cannot save the soul. Where does it teach this in the Bible? Well, getting baptized is a "work," and we are not saved by works (Eph. 2:8-9).
Baptism is a testimony of salvation (God's miraculous regeneration of the heart through "circumcision of the heart" producing God's gift of saving faith in Jesus as Savior). Water baptism is not indicative of salvation, because salvation is God's work of regeneration of the heart. See 1 Peter 3:21 and Titus 3:5. People can get baptized, but only God can save.
