This tradition has been transmitted through a different chain of narrators. According to this version. Aishah said: She would wash herself for every prayer.
USC-MSA web (English) Reference: Book 1 , Number 289
قال الشيخ الألباني: صحيح
قال الشيخ زبير على زئي: إسناده صحيح انظر سنن ابي داود: 285