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Here are some scripture passages that talk about the saving waters.
Paul is talking about being washed with baptismal waters;
9 Do you not know that the unjust will not inherit the
kingdom of God? Do not be deceived; neither fornicators
nor idolaters nor adulterers nor boy prostitutes nor
[size=]10 nor thieves nor the greedy nor drunkards nor slanderers
nor robbers will inherit the kingdom of God.
11 That is what some of you used to be; but now you
have had yourselves washed, you were sanctified,
you were justified in the name of the Lord Jesus Christ
and in the Spirit of our God.[/size] 1 Cor 6:9-11
Since everyone in the beginning of Christ’s Church were “converts” most of these people were baptized as adults. All their sins were washed away, including original sins. And the families of these adults were also baptized. Children and infants were also included in the baptisms. So even a child/infant who has no real sin of there own were washed clean from original sin.
The waters of baptism save us. And if it did not clean us from the original sin then we would not be saved from baptismal waters. But we are saved from that water. It is not merely symbolic.
18 For Christ also suffered for sins once, the righteous
for the sake of the unrighteous, that he might lead you to God.
Put to death in the flesh, he was brought to life in the spirit.
[size=]19 In it he also went to preach to the spirits in prison,
20 who had once been disobedient while God patiently waited
in the days of Noah during the building of the ark, in which
a few persons, eight in all, were saved through water.
21 This prefigured baptism, which saves you now. It is not a
removal of dirt from the body but an appeal to God for a clear
conscience, through the resurrection of Jesus Christ,
22 who has gone into heaven and is at the right hand of God, with
angels, authorities, and powers subject to him.[/size] 1 Peter 3:18-21