The body of Christ really rested in the tomb, and really rose again
Furthermore in the matter which you placed last in your confidential letter, I am surprised that any intelligent Christian should be in difficulty as to whether when Christ descended to the realms below, his flesh rested in the tomb: for as it truly died and was buried, so it was truly raised the third day. For this the Lord Himself also had announced, saying to the Jews, “destroy this temple, and in three days I will raise it up.” Where the evangelist adds this comment: “but this He spoke of the temple of His body.” The truth of which the prophet David also had predicted, speaking in the person of the Lord and Saviour, and saying: “Moreover my flesh also shall rest in hope; because You will not leave my soul in Hades, nor give Your Holy One to see corruption.” From these words surely it is clear that the Lord's flesh being buried, both truly rested and did not undergo corruption: because it was quickly revived by the return of the soul, and rose again. Not to believe this is blasphemous enough, and is undoubtedly of a piece with the doctrine of Manichæus and Priscillian, who with their blasphemous conceptions pretend to confess Christ, but only in such a way as to destroy the reality of His incarnation, and death, and resurrection.
Therefore let a council of bishops be held among you, and let the priests of neighbouring provinces meet at a place suitable to all: that, on the lines of our reply to your request for advice, a full inquiry may be made as to whether here are any of the bishops who are tainted with the contagion of this heresy: for they must without doubt be cut off from communion, if they refuse to condemn this most unrighteous sect with all its wrongful conceptions. For it can nohow be permitted that one who has undertaken the duty of preaching the Faith should dare to maintain opinions contrary to Christ's gospel and the creed of the universal Church. What kind of disciples will there be in a place where such masters teach? What will the people's religion, or the salvation of the laity be, where against the interests of human society the holiness of chastity is uprooted, the marriage-bond overthrown, the propagation of children forbidden, the nature of the flesh condemned, and, in opposition to the true worship of the true God, the Trinity of the Godhead is denied, the individuality of the persons confounded, man's soul declared to be the Divine essence, and enclosed in flesh at the Devil's will, the Son of God proclaimed only-begotten in right of being born of a Virgin, not begotten of the Father, and at the same time maintained to be neither true offspring of God, nor true child of the virgin: so that after a false passion and an unreal death, even the resurrection of the flesh reassumed out of the tomb should be considered fictitious? But it is vain for them to adopt the name of Catholic, as they do not oppose these blasphemies: they must believe them, if they can listen so patiently to such words. And so we have sent a letter to our brethren and fellow bishops of the provinces of Tarraco, Carthago, Lusitania and Gallicia, enjoining a meeting of the general synod. It will be yours, beloved, to take order that our authoritative instructions be conveyed to the bishops of the aforesaid provinces. But should anything, which God forbid, hinder the coming together of a general council of Gallicia, at least let the priests come together, the assembling of whom our brothers Idacius and Ceponius shall look to, assisted by your own strenuous efforts to hasten the applying of remedies to these serious wounds by a provincial synod also. Dated July 21, in the consulship of the illustrious Calipius and Ardaburis (447).
Source: Letters (New Advent)