εἰσιτέον
From LSJ
Ἰὸς πέφυκεν ἀσπίδος κακὴ γυνή → Ipsum venenum aspidis mulier mala → Das reinste Natterngift ist eine schlechte Frau
English (LSJ)
A one must go in, Iamb.VP23.105, al.
Spanish (DGE)
hay que ir εἰ. εἴσω δ' ἐστίν Men.Cith.63, cf. Iambl.VP 105.