Nicene and Post-Nicene Fathers, Ser. II, Vol. XIV:
The Canons of the Council in Trullo; Often Called The Quinisext Council.: Canon LXXXIII

Canon LXXXIII.

No one may give the Eucharist to the bodies of the dead; for it is written “Take and eat.”  But the bodies of the dead can neither “take” nor “eat.”

Notes.

Ancient Epitome of Canon LXXXIII.

The Sacraments must not be given to a dead body.

This is canon iv. of the Council of Hippo, in the year 393.  (Vide Hefele, Vol. II., p. 397.)  The earlier canon includes baptism also, in its prohibition.  This is canons xviii. and xx. of the African code, according to the Greek numbering.