'Washed' in the Bible

And David said to Uriah, Go down to your house and let your feet be washed. And Uriah went away from the king's house, and an offering from the king was sent after him.

And Mephibosheth, the son of Saul's son, came down for the purpose of meeting the king; his feet had not been cared for or his hair cut or his clothing washed from the day when the king went away till the day when he came back in peace.