ἐπιτόκιον
From LSJ
Τοὺς δούλους ἔταξεν ὡρισμένου νομίσματος ὁμιλεῖν ταῖς θεραπαινίσιν → He arranged for his male slaves to have sex with female slaves at a fixed price (Plutarch, Life of Cato the Elder 21.2)
English (LSJ)
τό,=ἐπιτοκία, BGU223.7 (ii A.D.), v.l. in Aesop.177b (p.257 Chambry)(pl.).
German (Pape)
[Seite 994] τό, der Zins, Aesop. 133.