Baptized "as a witness and a testimony"

1. Mosiah 21: 35
     35 They were desirous to be baptized as a witness and a testimony that they were willing to serve God with all their hearts; nevertheless they did prolong the time; and an account of their baptism shall be ^agiven hereafter.
2. 3 Ne. 7: 25
     25 Therefore, there were ordained of Nephi, men unto this ministry, that all such as should come unto them should be ^abaptized with water, and this as a witness and a testimony before God, and unto the people, that they had repented and received a ^bremission of their sins.