χορευτέον
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
English (LSJ)
A one must dance, E.Ba.324.
German (Pape)
[Seite 1365] adj. verb. von χορεύω, man muß Chortänze aufführen, Eur. Bacch. 305.