τοῦ πολέμου οἱ καιροὶ οὐ μενετοί

From LSJ

ἐάν μή διδάξητε περί ἀρετὴς τούς τό ἀργύριον κλέψαντας, οὐ ταξόμεθα οἱ ὁπλῖται → if you don't teach those who have stolen money a lesson on moral virtue, we, the hoplites, will not line up

Source

English > Greek (Woodhouse Quotes Reversed)

the chances of war will not wait