Tertullian

“ But I will descend even to this point of contest now, making a separation between the doctrine of apostles and their power. Discipline governs a man, power sets a seal upon him; apart from the fact that power is the Spirit, but the Spirit is God. What, moreover, used (the Spirit) to teach? That there must be no communicating with the works of darkness. [1] Observe what He bids. Who, moreover, was able to forgive sins? This is His alone prerogative: for “who remitteth sins but God alone?” ”

“ For, in accordance with the person of Peter, it is to spiritual men that this power will correspondently appertain, either to an apostle or else to a prophet. For the very Church itself is, properly and principally, the Spirit Himself, in whom is the Trinity of the One Divinity—Father, Son, and Holy Spirit. ”

“ Hence the power of loosing and of binding committed to Peter had nothing to do with the capital sins of believers; and if the Lord had given him a precept that he must grant pardon to a brother sinning against him even “seventy times sevenfold,” of course He would have commanded him to “bind”—that is, to “retain” [18] —nothing subsequently, unless perchance such (sins) as one may have committed against the Lord, not against a brother. For the forgiveness of (sins) committed in the case of a man is a prejudgment against the remission of sins against God. ”