Musannaf Ibn Abi Shayba 1:1686

Ibn ‘Ulayyah narrated to us, from Sa‘id, from Qatadah, from ‘Urwah, from Sa‘id ibn ‘Abd al-Rahman ibn Abza, from his father, from ‘Ammar, from the Prophet (may Allah bless him and grant him peace), that he said regarding tayammum: "One strike for the face and the palms."