ἀποικιστέον
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 send away, Paul.Aeg.4.1.
Greek (Liddell-Scott)
ἀποικιστέον: ῥημ. ἐπίθ. πρέπει τις ν’ ἀπομακρύνῃ τι, νὰ πέμψῃ ἀυτὸ μακράν, πόρρω τῆς ἀληθείας ἀποικιστέον Κλήμ. Ἀλ. 233.