Musannaf Ibn Abi Shaybah 79 — How many times ablution is performed

Ja'far bin Burqan said: I asked al-Zuhri: "How many times is it sufficient to wash the face and the forearms in ablution?" He said: In my view, washing once thoroughly is sufficient. I said to him: But Maymun says that the face should be washed three times and the forearms three times! He said: That is the care and perfection of ablution.