God does the work of saving. But we must follow His instructions to believe and be baptized. God waited in the days of Noah, while the ark was a preparing, wherein few, that is, eight souls were saved by water. The like figure whereunto even baptism doth also now SAVE us. In the same way, baptism does not earn us salvation but we must be baptized to be saved.
Some people believe baptism can be accomplished by sprinking or pouring.
Every Bible example of baptism involved believers. There is NOT one single Bible example of an infant being baptized. Nor is there a command to baptize infants. Infants are NOT born in sin. Infants are too young to believe.