The New birth.
Joh 3:6 That which is born of the flesh is flesh; and that which is born of the Spirit is spirit.
Eph 5:26 That he might sanctify and cleanse it with the washing of water by the word.
Eze 36:25 Then will I sprinkle clean water upon you, and ye shall be clean: from all your filthiness, and from all your idols, will I cleanse you.
Eze 36:26 A new heart also will I give you, and a new spirit will I put within you: and I will take away the stony heart out of your flesh, and I will give you an heart of flesh.
1 Pet 1:23 Being born again, not of corruptible seed, but of incorruptible, by the word of God, which liveth and abideth for ever.