Thomas Aquinas

“ For as sight requires that the body seen be in contact with the adjacent medium of sight, so does passion require contact of the suffering body with the active agents. But Christ's body, according as it is under the sacrament, as stated above (A [1] , ad 2; [4668] Q [76] , A [5] ) , is not compared with its surroundings through the intermediary of its own dimensions, whereby bodies touch each other, but through the dimensions of the bread and wine; consequently, it is those species which are acted upon and are seen, but not Christ's own body. ”

“ But at the time when Christ suffered, when His blood was really separated from His body, if this sacrament had been consecrated, then the body only would have been present under the species of the bread, and the blood only under the species of the wine.
Reply to Objection 3: As was observed above ( [4672] Q [76] , A [1] , ad 1) , Christ's soul is in this sacrament by real concomitance; because it is not without the body: but it is not there in virtue of the consecration. ”

“ And as Augustine says (Tract. lxii in Joan.) , "it must be understood that our Lord had already distributed the sacrament of His body and blood to all His disciples, among whom was Judas also, as Luke narrates: and after that, we came to this, where, according to the relation of John, our Lord, by dipping and handing the morsel, does most openly declare His betrayer."
Art. 3 - Whether Christ received and gave to the disciples His impassible body? Objection 1: It seems that Christ both received and gave to the disciples His impassible body. ”