Laudator Temporis Acti

Greek Anthology 9.127 (tr. W.R. Paton):

If a little sweet wine remains in a vessel, this remnant turns to vinegar. So the old man who has quite emptied life and has reached the depth of eld becomes sour-tempered.

ἂν περιλειφθῇ μικρὸν ἐν ἄγγεσιν ἡδέος οἴνου,
  εἰς ὀξὺ τρέπεται τοῦτο τὸ λειπόμενον·
οὕτω ἀπαντλήσας τὸν ὅλον βίον, εἰς βαθὺ δ᾽ ἐλθὼν
  γῆρας, ὁ πρεσβύτης γίνεται ὀξύχολος.

Two words in the opening couplet (περιλειφθῇ...λειπόμενον) are an example of compound-simplex verbal iteration, where the simplex verb has the meaning of the preceding compound verb. On this idiom see:

• Calvert Watkins, "An Indo-European Construction in Greek and Latin," Harvard Studies in Classical Philology 71 (1966) 115-119
• Robert Renehan, Greek Textual Criticism: A Reader (Cambridge: Harvard University Press, 1969), pp. 77-85
• Robert Renehan, Studies in Greek Texts: Critical Observations to Homer, Plato, Euripides, Aristophanes and other Authors (Göttingen: Vandenhoeck & Ruprecht, 1976), pp. 11-27
• James Diggle, Euripidea: Collected Essays (Oxford: Clarendon Press, 1994), p. 84, n. 64 (on Euripides' Suppliant Women 811-812)

Related post: An Image of Old Age.