"The word wuzu is derived from waza, meaning beauty, and in Islamic terminology, it means the washing of certain parts of the body before prayers.
The commentators agree that in its formative stage, the Prophet's Mosque in Medina was too small, about 54 yards wide and 60 yards in length, but frequented by both rich and poor. The poor comprised of the farmers, labourers and slaves. They gave up their works upon the call to the prayers and entered the mosque. Their clothes were dirty and drenched in perspiration. Abu Huraira and some inmates of Suffa said: We ate meal and when the prayer time came, we wiped our fingers against the pebbles and proceeded to say prayer