Yahya related to me from Malik that Abu'z Zubayr al-Makki said,"I saw Abdullah ibn Abbas doing tawaf after asr. Then he went into hisroom and I do not know what he did." (ES)
USC-MSA web (English) reference: Book 20, Hadith 119 (ES)
Arabic reference (ES): Book 20, Hadith 822 (ES)