λανθάνειν ποιῶν τι
From LSJ
Γαμεῖν δὲ μέλλων βλέψον εἰς τοὺς γείτονας → Quaeris maritus esse? Vicinos vide → Auf deine Nachbarn sieh, wenn du an Hochzeit denkst
Greek > English (Woodhouse)
do a thing imperceptibly, do a thing inadvertantly, do a thing unconsciously, do a thing unobserved, do a thing unperceived, do a thing unseen, do a thing unwittingly