Laudator Temporis Acti

Homer, Iliad 9.613-615 (Achilles to Phoenix; this man = Agamemnon; tr. Richmond Lattimore):

                                                               It does not become you
to love this man, for fear you turn hateful to me, who love you.
It should be your pride with me to hurt whoever shall hurt me.

                                                    οὐδέ τί σε χρὴ
τὸν φιλέειν, ἵνα μή μοι ἀπέχθηαι φιλέοντι.
καλόν τοι σὺν ἐμοὶ τὸν κήδειν ὅς κ᾽ ἐμὲ κήδῃ.

Theognis 869-872 (tr. Douglas E. Gerber):

May the great wide bronze sky fall upon me from above, the fear of earth-born men, if I do not aid those who are my friends and cause my enemies pain and great misery.

ἔν μοι ἔπειτα πέσοι μέγας οὐρανὸς εὐρὺς ὕπερθεν
    χάλκεος, ἀνθρώπων δεῖμα χαμαιγενέων,
εἰ μὴ ἐγὼ τοῖσιν μὲν ἐπαρκέσω οἵ με φιλεῦσιν,
    τοῖς δ' ἐχθροῖσ' ἀνίη καὶ μέγα πῆμ' ἔσομαι.

Archilochus, fragment 23 West, lines 14-16 (tr. Laura Swift):

Indeed, I know how to love my friend
and hate and attack my enemy,
like an ant. There is truth, then, in my words.

ἐπ]ίσταμαί τοι τὸν φιλ[έο]ν[τα] μὲν φ[ι]λεῖν[,
τὸ]ν δ' ἐχθρὸν ἐχθαίρειν τε [κα]ὶ κακο[στομέειν
μύ]ρμηξ. λόγῳ νυν τ[ῷδ' ἀλη]θείη πάρ[α.