Viaticum

VIATICUM. A provision made for a journey. In the ancient Church both baptism and the Eucharist were called Viatica, because they are equally necessary for the safe passage of a man through this world to eternal life. More particularly, however, the term is used of the Eucharist given to persons in immediate danger of death. The 13th Canon of the Council of Nice ordains that none "be deprived of his perfect and most necessary viaticum  when he departs out of this life."