Ameer al-Momineen (a.s) passed by a mosque which had thick extruding bases (like benches), so he ordered these extrusions to be removed. Then again the extrusions were rebuilt (by others) and he ordered them to be removed again. This was repeated for three times. Then he addressed those sitting on these benches that “If you must (sit here), then lower your eyes and hands (do not watch others), take back the lost ones (could mean the animals/camels that have gone astray) and guide the people to their destinations. In short be useful, if you must sit around.”