Oh friends, be men! Deep treasure in your hearts
An honest shame, and, fighting bravely, fear
Each to incur the censure of the rest.
Of men so minded more survive than die,
While dastards forfeit life and glory both.

[ὦ φίλοι ἀνέρες ἔστε, καὶ αἰδῶ θέσθ᾽ ἐνὶ θυμῷ,
ἀλλήλους τ᾽ αἰδεῖσθε κατὰ κρατερὰς ὑσμίνας.
αἰδομένων δ᾽ ἀνδρῶν πλέονες σόοι ἠὲ πέφανται:
φευγόντων δ᾽ οὔτ᾽ ἂρ κλέος ὄρνυται οὔτέ τις ἀλκή.]

Homer (fl. 7th-8th C. BC) Greek author
The Iliad, Book 15, l. 561ff [Ajax] (c. 750 BC) [tr. Cowper (1791), l. 679ff]
    (Source)

Original Greek. Alternate translations:

Good friends, bring but yourselves to feel the noble stings of shame
For what ye suffer, and be men. Respect each other’s fame;
For which who strives in shame’s fit fear, and puts on ne’er so far,
Comes oft’ner off. Then stick engag’d; these fugitives of war
Save neither life, nor get renown, nor bear more mind than sheep.
[tr. Chapman (1611), l. 508ff]

O Greeks! respect your fame,
Respect yourselves, and learn an honest shame:
Let mutual reverence mutual warmth inspire,
And catch from breast to breast the noble fire.
On valour's side the odds of combat lie,
The brave live glorious, or lamented die;
The wretch that trembles in the field of fame,
Meets death, and worse than death, eternal shame.
[tr. Pope (1715-20)]

O my friends, be men, and set honour in your hearts, and have reverence for each other during the vehement conflicts. For more of those men who reverence each other are saved than slain; but of the fugitives, neither glory arises, nor any defence.
[tr. Buckley (1860)]

Brave comrades, quit ye now like men;
Bear a stout heart; and in the stubborn fight
Let each to other mutual succour give;
By mutual succour more are sav’d than fall;
In timid flight nor fame nor safety lies.
[tr. Derby (1864)]

My friends, be men, and fear dishonour; quit yourselves in battle so as to win respect from one another. Men who respect each other's good opinion are less likely to be killed than those who do not, but in flight there is neither gain nor glory.
[tr. Butler (1898)]

My friends, be men, and take ye shame in your hearts, and have shame each of the other in the fierce conflict. Of men that have shame more are saved than are slain; but from them that flee springeth neither glory nor any avail.
[tr. Murray (1924)]

Friends, respect yourselves as men,
respect each other in the moil of battle!
Men with a sense of shame survive
more often than they perish. Those who run
have neither fighting power nor any honor.
[tr. Fitzgerald (1974)]

Be men, my friends! Discipline fill your hearts!
Dread what comrades say of you here in bloody combat!
When men dread that, more men come through alive --
when soldiers break and run, good-bye glory,
good-bye all defenses!
[tr. Fagles (1990), l. 651ff]

Now, dear friends, be men, keep hold of your valorous spirit,
feel shame, each on account of the rest in the violent combats;
more of the men who feel such shame live safely than perish,
while from the ones who flee no glory nor any defense springs.
[tr. Merrill (2007), l. 529ff]