Here is how the Bible defines baptism, and notice that I'm using the New World translation since we are dealing with a doctrine of Jehovah's Witnesses.
Nakhu ukuthi iBhayibheli likuchaza kanjani ukubhabhadiswa, futhi qaphela ukuthi ngisebenzisa inguqulo Yezwe Elisha ngoba sibhekene nemfundiso yoFakazi BakaJehova.