25 And now by certain of us the baptism of heretics is asserted to occupy the (like) ground, and, as if by a certain dislike of re-baptizing, it is counted unlawful to baptize after God's enemies. And this, although we find that they were baptized whom John had baptized: John, esteemed the greatest among the prophets; John, filled with divine grace even in his mother's womb; who was sustained with the spirit and power of Elias; who was not an adversary of the Lord, but His precursor and announcer; who not only foretold our Lord in words, but even showed Him to the eyes; who baptized Christ Himself by whom others are baptized.
But if on that account a heretic could obtain the right of baptism, because he first baptized, then baptism will not belong to the person that has it, but to the person that seizes it. And since baptism and the Church can by no means be separated from one another, and divided, he who has first been able to lay hold on baptism has equally also laid hold on the Church; and you begin to appear to him as a heretic, when you being anticipated, have begun to be last, and by yielding and giving way have relinquished the right which you had received. But how dangerous it is in divine matters, that any one should depart from his right and power, Holy Scripture declares when, in Genesis, Esau thence lost his birthright, nor was able afterwards to regain that which he had once given up.
Source: The Epistles of Cyprian (New Advent)