Musannaf Ibn Abi Shayba 1:199

Ibn ‘Ulayyah narrated to us, from Rawh ibn al-Qasim, from ‘Abdullah ibn Muhammad ibn ‘Aqil, from al-Rubayyi’ bint Mu’awwidh ibn ‘Afra’, who said: Ibn ‘Abbas came to me and asked me about this hadith—meaning her hadith in which she mentioned that she saw the Prophet, may Allah bless him and grant him peace, perform ablution (wudu) and that he washed his feet. She said: Ibn ‘Abbas then said, "The people refuse anything but washing, yet I do not find in the Book of Allah anything but wiping."