Euripides, fragment 892 (tr. Christopher Collard and Martin Cropp):
Why, what do mortals need but just two things, Demeter's grain and running water to drink—things which are at hand and were made to give us nourishment? But their abundance does not satisfy us; we are choosy and hunt for ways of contriving different foods.
ἐπεὶ τί δεῖ βροτοῖσι πλὴν δυοῖν μόνον,
Δήμητρος ἀκτῆς πώματός θ' ὑδρηχόου,
ἅπερ πάρεστι καὶ πέφυχ' ἡμᾶς τρέφειν;
ὧν οὐκ ἀπαρκεῖ πλησμονή· τρυφῇ δέ τοι
ἄλλων ἐδεστῶν μηχανὰς θηρεύομεν.
Related post: Bread and Water