Al-Kāfi

3. A number of our people have narrated from Ahmad ibn Muhammad and abu Dawud all from al-Husayn ibn Sa‘id from Fadalah ibn Dawud ibn Farqad who has said the following: “I once heard abu ‘Abd Allah (a.s.), say, ‘My father would say, “Wudu 5 has certain limits. If one trespasses such limits, he will not receive any reward.” My father would also say, “(Certain people) only make it perplexed.’” A man then asked, ‘What then are the limits of Wudu’?’ He (the Imam) said, ‘Wash your face and hands and wipe your head and feet.’”