Jesus answered, “Truly, truly, I say to you, unless one is born of water and the Spirit, he cannot enter the kingdom of God - John 3:5
And now why do you wait? Rise and be baptized, and wash away your sins, calling on his name. - Acts 22:16
Baptism, which corresponds to this, now saves you, not as a removal of dirt from the body but as an appeal to God for a clear conscience, through the resurrection of Jesus Christ - 1 Peter 3:21