Sirach 19:27

Casting down his countenance, and making as if he heard not: where he is not known, he will do you a mischief before you be aware.

Casting down his countenance, and making as if he heard not: where he is not known, he will do thee a mischief before thou be aware.

bowing down his face, and pretending to be deaf in one ear. Where he isn’t known, he will take advantage of you.