Jeremiah 9:8

9:8 Their tongue is a deadly arrow; it speaks deceit: one speaks peaceably to his neighbor with his mouth, but in his heart he lays wait for him.
-World English Bible

Other Translation

9:8 Their tongue [is as] an arrow shot out; it speaketh deceit: [one] speaketh peaceably to his neighbour with his mouth, but in heart he layeth his wait.
-King James Version