Dust

To cast dust on the head was a sign of mourning (Joshua 7:6 ); and to sit in dust, of extreme affliction (Isaiah 47:1 ). "Dust" is used to denote the grave (Job 7:21 ). "To shake off the dust from one's feet" against another is to renounce all future intercourse with him (Matthew 10:14; Acts 13:51 ). To "lick the dust" is a sign of abject submission (Psalm 72:9 ); and to throw dust at one is a sign of abhorrence (2 Samuel 16:13; Compare Acts 22:23 ).