Lamentations 3:29 in the King James Version
He putteth his mouth in the dust; if so be there may be hope.
Context
28 Let him sit alone and keep silence, because he has laid it on him.
29 Let him put his mouth in the dust, if it is so that there may be hope.
30 Let him give his cheek to him who strikes him. Let him be filled full of reproach.