1 Peter 1:23 (KJV)
23 Being born again, not of corruptible seed, but of incorruptible, by the word of God, which liveth and abideth for ever.
Not by virtue of any descent from human parents” - Doddridge. The result of such a birth, or of being begotten in this way - for so the word rendered “born again” more properly signifies - is only corruption and decay. We are begotten only to die. There is no permanent, enduring life produced by that. It is in this sense that this is spoken of as, “corruptible seed,” because it results in decay and death. The word here rendered “seed” - σπορά spora- occurs nowhere else in the New Testament.