Abu Darda (may Allah be pleased with him) narrates: When the Messenger of Allah (peace and blessings be upon him) would sit, we would sit around him. Then when he would stand up and intended to return, he would take off his sandal or place something of his there, by which the companions would understand (that the Messenger of Allah, peace and blessings be upon him, would return), and they would remain sitting there. Its chain is weak. Narrated by Abu Dawood.