It is narrated from Hazrat Anas bin Malik (may Allah be pleased with him) that a vessel was brought to the Prophet (peace and blessings be upon him) for ablution, and the Prophet (peace and blessings be upon him) performed ablution from it. The narrator says: I asked Hazrat Anas (may Allah be pleased with him), "Did the Prophet (peace and blessings be upon him) perform a new ablution for every prayer?" He replied, "Yes!" The narrator then asked Hazrat Anas (may Allah be pleased with him), "What did you people do?" He replied, "We used to perform several prayers with a single ablution until we became invalidated."