Apophthegmata Laconica
Plutarch
Plutarch. Moralia, Vol. III. Babbitt, Frank Cole, translator. Cambridge, MA: Harvard University Press; London: William Heinemann Ltd., 1931 (printing).
He bade his soldiers eat their breakfast as if they were to eat their dinner in the other world. [*](Cf. Cicero, Tusculan Disputations, i. 42 (101); Valerius Maximus, iii. 2, ext. 3.)