λούτριον
From LSJ
ἀθρόαις πέντε δραπὼν νύκτεσσιν ἔν θ' ἁμέραις ἱερὸν εὐζοίας ἄωτον → for five whole nights and days, culling the sacred excellence of joyous living | reaping the sacred bloom of good living for five full nights and as many days
English (LSJ)
τό,
A water that has been used in washing, Ar.Eq. 1401, Fr.306, Luc.Lex.4. II = λουτήρ, λ. χαλκοῦν μέγα CPR p.125 (iii A. D.).