λανθάνειν τι ποιῶν
From LSJ
ἢν μή τις ὥσπερ σφηκιὰν βλίττῃ με κἀρεθίζῃ → may no one squeeze me and tease me like a wasp | may no one smoke me and tease me like a wasp | but if anyone annoys me and rifles my nest, they'll find a wasp inside | still if you wake a wasps' nest then of wasps you must beware
Greek > English (Woodhouse)
do a thing insensibly, do a thing unawares, do a thing undetected
