Augustine of Hippo

But, even if the angels, whose nature is simple and spiritual, are said to have tongues with which they sing praises to their Lord and Creator and give him unceasing thanks, much more must the spiritualized bodies of men do so after the resurrection. For all the members of their glorified flesh will have tongues in their mouths, and they will give voice to their speaking tongues, and thus they will utter divine praises, the outpouring in words of their love and of the joys that fill even their senses. Doubtless the Lord will add this to the grace and glory of his saints in the time of his kingdom, that the more perfectly they attain to this blessed condition of body by a happy transformation, the more fully will they sing with tongue and voice. Being established in their spiritual bodies, they may speak, perchance, not with the tongues of men but with those of angels, such as the apostle heard in paradise.